ARM i.MX: remove PWM platform support

As the i.MX pwm driver is devicetree only, remove the platform
support for this device.

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

diff --cc arch/arm/mach-imx/clk-imx21.c
Simple merge

diff --cc arch/arm/mach-imx/clk-imx25.c
Simple merge

diff --cc arch/arm/mach-imx/clk-imx27.c
Simple merge

diff --cc arch/arm/mach-imx/clk-imx51-imx53.c
Simple merge

diff --cc arch/arm/mach-imx/devices-imx25.h
Simple merge

diff --cc arch/arm/mach-imx/devices-imx51.h
Simple merge

diff --cc arch/arm/mach-imx/devices/Kconfig
Simple merge

diff --cc arch/arm/mach-imx/devices/Makefile
Simple merge

diff --cc arch/arm/mach-imx/devices/devices-common.h
Simple merge

diff --cc arch/arm/mach-imx/devices/platform-mxc_pwm.c
Simple merge