arm: mach-imx/mxs: drop 'default' boards

No boards should be compiled in by default.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index 4522fbb..21de5d5 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -24,7 +24,6 @@
 	select MXS_HAVE_PLATFORM_AUART
 	select MXS_HAVE_PLATFORM_MXS_MMC
 	select MXS_HAVE_PLATFORM_MXSFB
-	default y
 	help
 	  Include support for MX23EVK platform. This includes specific
 	  configurations for the board and its peripherals.
@@ -39,7 +38,6 @@
 	select MXS_HAVE_PLATFORM_MXS_MMC
 	select MXS_HAVE_PLATFORM_MXSFB
 	select MXS_OCOTP
-	default y
 	help
 	  Include support for MX28EVK platform. This includes specific
 	  configurations for the board and its peripherals.