pwm: pwm-mxs: use global reset function stmp_reset_block

Use global reset function stmp_reset_block instead of mxs_reset_block
to remove <mach/common.h> inclusion.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 39bdebc..5227415 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -30,6 +30,7 @@
 config PWM_MXS
 	tristate "Freescale MXS PWM support"
 	depends on ARCH_MXS && OF
+	select STMP_DEVICE
 	help
 	  Generic PWM framework driver for Freescale MXS.