ARM: OMAP3+: Detect reset type

Certain modules are not affected by means of
a warm reset and need not be configured again.
Adding an API to detect the reset reason warm/cold.

This will be used to skip the module configurations
that are retained across a warm reset.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: R Sricharan <r.sricharan@ti.com>
diff --git a/arch/arm/include/asm/arch-omap3/cpu.h b/arch/arm/include/asm/arch-omap3/cpu.h
index 457f99d..5683e16 100644
--- a/arch/arm/include/asm/arch-omap3/cpu.h
+++ b/arch/arm/include/asm/arch-omap3/cpu.h
@@ -479,6 +479,8 @@
 
 #define PRM_RSTCTRL		0x48307250
 #define PRM_RSTCTRL_RESET	0x04
+#define PRM_RSTST			0x48307258
+#define PRM_RSTST_WARM_RESET_MASK	0x7D2
 #define SYSCLKDIV_1		(0x1 << 6)
 #define SYSCLKDIV_2		(0x1 << 7)