am33xx: Finish migration of CONFIG_AM33XX/AM43XX

Almost all users of CONFIG_AM33XX/AM43XX have been migrated.  Finish
moving the last few over to Kconfig, and put all of the boards under the
appropriate Kconfig chocie now.  This board choice is non-optional, so
remove that keyword on am33xx.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index d161b51..683cdb9 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -2,57 +2,7 @@
 
 choice
 	prompt "OMAP2+ platform select"
-	default TARGET_BRXRE1
-
-config TARGET_BRXRE1
-	bool "Support BRXRE1"
-	select BOARD_LATE_INIT
-
-config TARGET_BRPPT1
-	bool "Support BRPPT1"
-	select BOARD_LATE_INIT
-
-config TARGET_DRACO
-	bool "Support draco"
-	select BOARD_LATE_INIT
-	select DM
-	select DM_SERIAL
-	select DM_GPIO
-
-config TARGET_THUBAN
-	bool "Support thuban"
-	select BOARD_LATE_INIT
-	select DM
-	select DM_SERIAL
-	select DM_GPIO
-
-config TARGET_RASTABAN
-	bool "Support rastaban"
-	select BOARD_LATE_INIT
-	select DM
-	select DM_SERIAL
-	select DM_GPIO
-
-config TARGET_ETAMIN
-	bool "Support etamin"
-	select BOARD_LATE_INIT
-	select DM
-	select DM_SERIAL
-	select DM_GPIO
-
-config TARGET_PXM2
-	bool "Support pxm2"
-	select BOARD_LATE_INIT
-	select DM
-	select DM_SERIAL
-	select DM_GPIO
-
-config TARGET_RUT
-	bool "Support rut"
-	select BOARD_LATE_INIT
-	select DM
-	select DM_SERIAL
-	select DM_GPIO
+	default OMAP34XX
 
 config OMAP34XX
 	bool "OMAP34XX SoC"
@@ -151,9 +101,6 @@
 	  protocols, optional 3D graphics and an optional customer
 	  programmable secure boot.
 
-config TARGET_CM_T43
-	bool "Support cm_t43"
-
 endchoice
 
 config SYS_MPUCLK