pwm: tiehrpwm: inline accessor functions

These elementary functions should be inlined for fastest access. Also
fixes this warning as a side-effect (when no PM_SLEEP is selected):

drivers/pwm/pwm-tiehrpwm.c:141:12: warning: 'ehrpwm_read' defined but not used [-Wunused-function]

Signed-off-by: Wolfram Sang <wsa@sang-engineering.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index f5e371d..cb75133 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -138,12 +138,12 @@
 	return container_of(chip, struct ehrpwm_pwm_chip, chip);
 }
 
-static u16 ehrpwm_read(void __iomem *base, int offset)
+static inline u16 ehrpwm_read(void __iomem *base, int offset)
 {
 	return readw(base + offset);
 }
 
-static void ehrpwm_write(void __iomem *base, int offset, unsigned int val)
+static inline void ehrpwm_write(void __iomem *base, int offset, unsigned int val)
 {
 	writew(val & 0xFFFF, base + offset);
 }