davinci: dm365: disable pulldowns for all MMC/SD1 pins.

This patch disables internal pulldowns for all MMC/SD1
pins. Presently only MMCSD1_CMD pin's pull down is
disabled, but with this some MMC/SD cards do not get
detected on MMC/SD1 slot of the EVM.

The problem was reproducible with SanDisk 4GB SDHC card.
Reported-by: Stephane Bovagne <s-bovagne@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/devices.c

@@ -213,7 +213,7 @@ void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
 				IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE + 0x7c);
 
 			/* Configure pull down control */
-			__raw_writel((__raw_readl(pupdctl1) & ~0x400),
+			__raw_writel((__raw_readl(pupdctl1) & ~0xfc0),
 					pupdctl1);
 
 			mmcsd1_resources[0].start = DM365_MMCSD1_BASE;