board: em_starterkit: Update the defconfig to em_starter_kit version 2.3

As em7d is supported, all configurations of em_starter_kit version 2.3
are supported. Update all the defconfig to version 2.3.

Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
diff --git a/boards/arc/em_starterkit/em_starterkit_defconfig b/boards/arc/em_starterkit/em_starterkit_defconfig
index e1825db..f8a6d59 100644
--- a/boards/arc/em_starterkit/em_starterkit_defconfig
+++ b/boards/arc/em_starterkit/em_starterkit_defconfig
@@ -1,5 +1,5 @@
 CONFIG_ARC=y
-CONFIG_SOC_EM7D=y
+CONFIG_SOC_EM9D=y
 CONFIG_BOARD_EM_STARTERKIT=y
 CONFIG_BOARD_EM_STARTERKIT_R23=y
 CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
diff --git a/boards/arc/em_starterkit/em_starterkit_em11d_defconfig b/boards/arc/em_starterkit/em_starterkit_em11d_defconfig
index 966b364..fc86350 100644
--- a/boards/arc/em_starterkit/em_starterkit_em11d_defconfig
+++ b/boards/arc/em_starterkit/em_starterkit_em11d_defconfig
@@ -1,7 +1,7 @@
 CONFIG_ARC=y
 CONFIG_SOC_EM11D=y
 CONFIG_BOARD_EM_STARTERKIT=y
-CONFIG_BOARD_EM_STARTERKIT_R22=y
+CONFIG_BOARD_EM_STARTERKIT_R23=y
 CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
 CONFIG_XIP=n
 CONFIG_PRINTK=y
diff --git a/boards/arc/em_starterkit/em_starterkit_em7d_defconfig b/boards/arc/em_starterkit/em_starterkit_em7d_defconfig
index 8590dcf..e1825db 100644
--- a/boards/arc/em_starterkit/em_starterkit_em7d_defconfig
+++ b/boards/arc/em_starterkit/em_starterkit_em7d_defconfig
@@ -1,7 +1,7 @@
 CONFIG_ARC=y
 CONFIG_SOC_EM7D=y
 CONFIG_BOARD_EM_STARTERKIT=y
-CONFIG_BOARD_EM_STARTERKIT_R22=y
+CONFIG_BOARD_EM_STARTERKIT_R23=y
 CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
 CONFIG_XIP=n
 CONFIG_PRINTK=y