modules: loramac-node: add SX1272 support

Add Kconfig option enabling Semtech-provided SX1272 driver.

Signed-off-by: Ilya Tagunov <tagunil@gmail.com>
diff --git a/modules/Kconfig.loramac-node b/modules/Kconfig.loramac-node
index 1c840b6..9cdcfee 100644
--- a/modules/Kconfig.loramac-node
+++ b/modules/Kconfig.loramac-node
@@ -20,6 +20,10 @@
 	help
 	  This option enables the use of Semtech's Radio drivers
 
+config HAS_SEMTECH_SX1272
+	bool
+	depends on HAS_SEMTECH_RADIO_DRIVERS
+
 config HAS_SEMTECH_SX1276
 	bool
 	depends on HAS_SEMTECH_RADIO_DRIVERS