imx: mx7: compile misc.c for mx7

Compile misc.c for mx7, since we need related function for
lcdif and nand.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Sanchayan Maity <maitysanchayan@gmail.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>

arch/arm/imx-common/Makefile

@@ -14,7 +14,7 @@ ifeq ($(SOC),$(filter $(SOC),mx5 mx6))
 obj-y	+= timer.o cpu.o speed.o
 obj-$(CONFIG_SYS_I2C_MXC) += i2c-mxv7.o
 endif
-ifeq ($(SOC),$(filter $(SOC),mx6 mxs))
+ifeq ($(SOC),$(filter $(SOC),mx7 mx6 mxs))
 obj-y	+= misc.o
 obj-$(CONFIG_SPL_BUILD)	+= spl.o
 endif