arm/imx: explicitly includes mach/hardware.h in mach-kzm_arm11_01.c

The mach-kzm_arm11_01.c references a number of things requiring the
explicit inclusion of mach/hardware.h.  Otherwise, when indirect
inclusion to mach/hardware.h gets cleaned up, we will see the following
compile error.

  CC      arch/arm/mach-imx/mach-kzm_arm11_01.o
arch/arm/mach-imx/mach-kzm_arm11_01.c:71:3: error: implicit declaration of function ‘IOMEM’
arch/arm/mach-imx/mach-kzm_arm11_01.c:71:3: error: implicit declaration of function ‘IMX_IO_P2V_MODULE’
arch/arm/mach-imx/mach-kzm_arm11_01.c:71:14: error: ‘MX31_CS4’ undeclared here (not in a function)
arch/arm/mach-imx/mach-kzm_arm11_01.c:71:14: error: ‘MX31_CS5’ undeclared here (not in a function)
arch/arm/mach-imx/mach-kzm_arm11_01.c:71:3: error: implicit declaration of function ‘IMX_IO_P2V’

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>