pwm: Move AB8500 PWM driver to PWM framework

This commit moves the driver to drivers/pwm and converts it to the new
PWM framework.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arun Murthy <arun.murthy@stericsson.com>
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 90c5c73..99a7381 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -29,6 +29,15 @@
 
 if PWM
 
+config PWM_AB8500
+	tristate "AB8500 PWM support"
+	depends on AB8500_CORE && ARCH_U8500
+	help
+	  Generic PWM framework driver for Analog Baseband AB8500.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called pwm-ab8500.
+
 config PWM_BFIN
 	tristate "Blackfin PWM support"
 	depends on BFIN_GPTIMERS