ARM: davinci: correct MDSTAT_STATE_MASK

MDSTAT.STATE occupies bits 0..5 according to all available documentation, so fix
the #define MDSTAT_STATE_MASK at last. Using the wrong value seems to have been
harmless though...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/include/mach/psc.h

@@ -243,7 +243,7 @@
 #define PSC_STATE_DISABLE	2
 #define PSC_STATE_ENABLE	3
 
-#define MDSTAT_STATE_MASK	0x1f
+#define MDSTAT_STATE_MASK	0x3f
 #define MDCTL_FORCE		BIT(31)
 
 #ifndef __ASSEMBLER__