hostap: Add build support for Zephyr

Only adds basic build support using Zephyr. Crypto support is disabled
till the MbedTLS integration is complete.

Signed-off-by: Sridhar Nuvusetty <sridhar.nuvusetty@nordicsemi.no>
Signed-off-by: Sachin Kulkarni <sachin.kulkarni@nordicsemi.no>
Signed-off-by: Ravi Dondaputi <ravi.dondaputi@nordicsemi.no>
Signed-off-by: Krishna T <krishna.t@nordicsemi.no>
diff --git a/modules/hostap/Kconfig b/modules/hostap/Kconfig
new file mode 100644
index 0000000..ae340be
--- /dev/null
+++ b/modules/hostap/Kconfig
@@ -0,0 +1,104 @@
+# WPA Supplicant configuration options
+#
+# Copyright (c) 2023 Nordic Semiconductor
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+config WIFI_NM_WPA_SUPPLICANT
+	bool "WPA Suplicant from hostap project [EXPERIMENTAL]"
+	select POSIX_CLOCK
+	select NET_SOCKETS
+	select NET_SOCKETS_PACKET
+	select NET_SOCKETPAIR
+	select NET_L2_WIFI_MGMT
+	select WIFI_NM
+	select EXPERIMENTAL
+	help
+	  WPA supplicant as a network management backend for WIFI_NM.
+
+config WIFI_NM_WPA_SUPPLICANT_THREAD_STACK_SIZE
+	int "Stack size for wpa_supplicant thread"
+	default 8192
+
+config NET_SOCKETPAIR_BUFFER_SIZE
+	default 4096
+
+config POSIX_MAX_FDS
+	# l2_packet - 1
+	# ctrl_iface - 2 * socketpairs = 4(local and global)
+	# z_wpa_event_sock - 1 socketpair = 2
+	# Remaining left for the applications running in default configuration
+	default 16 if !POSIX_API
+
+# Control interface is stack heavy (buffers + snprintfs)
+# Making calls to RPU from net_mgmt callbacks (status - RSSI)
+config NET_MGMT_EVENT_STACK_SIZE
+	default 4096
+
+config NET_SOCKETS_POLL_MAX
+	default 6
+
+
+# Supplicant API is stack heavy (buffers + snprintfs) and control interface
+# uses socketpair which pushes the stack usage causing overflow for 2048 bytes.
+config SYSTEM_WORKQUEUE_STACK_SIZE
+	default 2560
+
+module = WIFI_NM_WPA_SUPPLICANT
+module-str = WPA supplicant
+source "subsys/logging/Kconfig.template.log_config"
+
+config WIFI_NM_WPA_SUPPLICANT_DEBUG_LEVEL
+	int "Min compiled-in debug message level for WPA supplicant"
+	default 0 if WIFI_NM_WPA_SUPPLICANT_LOG_LEVEL_DBG # MSG_EXCESSIVE
+	default 3 if WIFI_NM_WPA_SUPPLICANT_LOG_LEVEL_INF # MSG_INFO
+	default 4 if WIFI_NM_WPA_SUPPLICANT_LOG_LEVEL_WRN # MSG_WARNING
+	default 5 if WIFI_NM_WPA_SUPPLICANT_LOG_LEVEL_ERR # MSG_ERROR
+	default 6
+	help
+	  Minimum priority level of a debug message emitted by WPA supplicant that
+	  is compiled-in the firmware. See wpa_debug.h file of the supplicant for
+	  available levels and functions for emitting the messages. Note that
+	  runtime filtering can also be configured in addition to the compile-time
+	  filtering.
+
+if WIFI_NM_WPA_SUPPLICANT
+
+# Create hidden config options that are used in hostap. This way we do not need
+# to mark them as allowed for CI checks, and also someone else cannot use the
+# same name options.
+
+config SME
+	bool
+	default y
+
+config NO_CONFIG_WRITE
+	bool
+	default y
+
+config NO_CONFIG_BLOBS
+	bool
+	default y
+
+config CTRL_IFACE
+	bool
+	default y
+
+config NO_RANDOM_POOL
+	bool
+	default y
+
+config NO_WPA
+	bool
+	default y
+
+config NO_PBKDF2
+	bool
+	default y
+
+config ZEPHYR
+	bool
+	default y
+
+endif # WIFI_NM_WPA_SUPPLICANT