OMAP3: AM3505/3517 do not have IO wakeup capability

AM3505/3517 doesn't have IO wakeup capability, so we do not need to set
the bit OMAP3430_EN_IO and the bit OMAP3430_EN_IO_CHAIN in the register
PM_WKEN_WKUP when the system enters suspend state.

Tested on AM3517EVM and OMAP3530EVM.

Signed-off-by: Stanley.Miao <stanley.miao@windriver.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index c7bf0e1..ccaa1ed 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -179,6 +179,8 @@
 	OMAP3_CHECK_FEATURE(status, ISP);
 	if (cpu_is_omap3630())
 		omap3_features |= OMAP3_HAS_192MHZ_CLK;
+	if (!cpu_is_omap3505() && !cpu_is_omap3517())
+		omap3_features |= OMAP3_HAS_IO_WAKEUP;
 
 	/*
 	 * TODO: Get additional info (where applicable)