ARM: mxs: always build ocotp

With this patch ocotp support will always be build into the kernel on mxs.
Otherwise a DT-only kernel fails to link with:

arch/arm/mach-mxs/mach-mxs.c:169: undefined reference to `mxs_get_ocotp'
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/mach-mxs/Kconfig

@@ -2,9 +2,6 @@ if ARCH_MXS
 
 source "arch/arm/mach-mxs/devices/Kconfig"
 
-config MXS_OCOTP
-	bool
-
 config SOC_IMX23
 	bool
 	select ARM_AMBA
@@ -66,7 +63,6 @@ config MACH_MX28EVK
 	select MXS_HAVE_PLATFORM_MXS_SAIF
 	select MXS_HAVE_PLATFORM_MXS_I2C
 	select MXS_HAVE_PLATFORM_RTC_STMP3XXX
-	select MXS_OCOTP
 	help
 	  Include support for MX28EVK platform. This includes specific
 	  configurations for the board and its peripherals.
@@ -94,7 +90,6 @@ config MODULE_M28
 	select MXS_HAVE_PLATFORM_MXS_I2C
 	select MXS_HAVE_PLATFORM_MXS_MMC
 	select MXS_HAVE_PLATFORM_MXSFB
-	select MXS_OCOTP
 
 config MODULE_APX4
 	bool
@@ -106,7 +101,6 @@ config MODULE_APX4
 	select MXS_HAVE_PLATFORM_MXS_I2C
 	select MXS_HAVE_PLATFORM_MXS_MMC
 	select MXS_HAVE_PLATFORM_MXS_SAIF
-	select MXS_OCOTP
 
 config MACH_TX28
 	bool "Ka-Ro TX28 module"

arch/arm/mach-mxs/Makefile

 # Common support
-obj-y := devices.o icoll.o iomux.o system.o timer.o mm.o
+obj-y := devices.o icoll.o iomux.o ocotp.o system.o timer.o mm.o
 
-obj-$(CONFIG_MXS_OCOTP) += ocotp.o
 obj-$(CONFIG_PM) += pm.o
 
 obj-$(CONFIG_MACH_MXS_DT) += mach-mxs.o