ARM: pxa3xx: dts: Add defines for pinctrl-single,bias-pull{up,down}

This allows users of the pinctrl driver to specify either

  pinctrl-single,bias-pullup = MPF_PULL_UP;

or

  pinctrl-single,bias-pulldown = MPF_PULL_DOWN;

To activate the pull bits in the MFP registers.
Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>

arch/arm/boot/dts/pxa3xx.dtsi

@@ -70,6 +70,14 @@
 #define MFP_DS10X	< (0x6 << 10) MFP_DSMSK >
 #define MFP_DS13X	< (0x7 << 10) MFP_DSMSK >
 
+/*
+ * MFP bias pull mode for pins.
+ * Example of use: pinctrl-single,bias-pullup = MPF_PULL_UP;
+ */
+#define MPF_PULL_MSK	(0x7 << 13)
+#define MPF_PULL_DOWN	< (0x5 << 13) (0x5 << 13) 0 MPF_PULL_MSK >
+#define MPF_PULL_UP	< (0x6 << 13) (0x6 << 13) 0 MPF_PULL_MSK >
+
 /*
  * MFP low power mode for pins.
  * Example of use: