arm: kirkwood: Change naming of dram functions from km_foo() to mvebu_foo()

Additionally the SDRAM address decoding register address is not hard coded
in the C code any more. A define is introduced for this base address.

This makes is possible to use those gpio functions from other MVEBU SoC's
as well.

Signed-off-by: Stefan Roese <sr@denx.de>
Tested-by: Luka Perkov <luka@openwrt.org>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
diff --git a/board/keymile/km_arm/km_arm.c b/board/keymile/km_arm/km_arm.c
index 6621464..1c7c108 100644
--- a/board/keymile/km_arm/km_arm.c
+++ b/board/keymile/km_arm/km_arm.c
@@ -226,7 +226,7 @@
 	writel(tmp & (~KM_KIRKWOOD_SOFT_I2C_GPIOS) , MVEBU_GPIO0_BASE + 4);
 #endif
 	/* adjust SDRAM size for bank 0 */
-	kw_sdram_size_adjust(0);
+	mvebu_sdram_size_adjust(0);
 	kirkwood_mpp_conf(kwmpp_config, NULL);
 	return 0;
 }
@@ -234,7 +234,7 @@
 int board_init(void)
 {
 	/* address of boot parameters */
-	gd->bd->bi_boot_params = kw_sdram_bar(0) + 0x100;
+	gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;
 
 	/*
 	 * The KM_FLASH_GPIO_PIN switches between using a