ARM: OMAP4: PM: Add support for OMAP4 dpll api's

Most of the dpll api's from dpll.c are reused for OMAP4.
This patch does extend a few api's for OMAP4 support.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 5cb2dcb..61ee235 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -249,6 +249,11 @@
 		if (v == OMAP3XXX_EN_DPLL_LPBYPASS ||
 		    v == OMAP3XXX_EN_DPLL_FRBYPASS)
 			return dd->clk_bypass->rate;
+	} else if (cpu_is_omap44xx()) {
+		if (v == OMAP4XXX_EN_DPLL_LPBYPASS ||
+		    v == OMAP4XXX_EN_DPLL_FRBYPASS ||
+		    v == OMAP4XXX_EN_DPLL_MNBYPASS)
+			return dd->clk_bypass->rate;
 	}
 
 	v = __raw_readl(dd->mult_div1_reg);