pinctrl: Drop selecting PINCONF for MMP2, PXA168 and PXA910

These drivers do not need to select PINCONF.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 0074873..e9c11ed 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -96,7 +96,6 @@
 	bool "MMP2 pin controller driver"
 	depends on ARCH_MMP
 	select PINCTRL_PXA3xx
-	select PINCONF
 
 config PINCTRL_MXS
 	bool
@@ -133,13 +132,11 @@
 	bool "PXA168 pin controller driver"
 	depends on ARCH_MMP
 	select PINCTRL_PXA3xx
-	select PINCONF
 
 config PINCTRL_PXA910
 	bool "PXA910 pin controller driver"
 	depends on ARCH_MMP
 	select PINCTRL_PXA3xx
-	select PINCONF
 
 config PINCTRL_SINGLE
 	tristate "One-register-per-pin type device tree based pinctrl driver"