ARM: OMAP4: PM: Adds PRM register shift and mask bits

This patch adds OMAP4 specific PRM register bit field
shifts and masks. Auto generated using a python script
(gen_prm_shifts_and_mask.py) developed by Benoit Cousson,
Paul Walmsley and Rajendra Nayak.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>

arch/arm/mach-omap2/prcm-common.h

@@ -51,6 +51,12 @@
 #define OMAP3430_NEON_MOD				0xb00
 #define OMAP3430ES2_USBHOST_MOD				0xc00
 
+#define BITS(n_bit)	\
+	(((1 << n_bit) - 1) | (1 << n_bit))
+
+#define BITFIELD(l_bit, u_bit)	\
+	(BITS(u_bit) & ~((BITS(l_bit)) >> 1))
+
 /* OMAP44XX specific module offsets */
 
 /* CM1 instances */