da850evm: fix linux bootparam address

This patch fixes the LINUX_BOOT_PARAM_ADDR define to be based off of
PHYS_SDRAM_1 instead of CONFIG_SYS_MEMTEST_START. On da830 they are the same
thing but on da850 the CONFIG_SYS_MEMSTART define is offset from the
PHYS_SDRAM_1 start.

Without this patch it is not possible to boot linux on da850 -- bootm hangs
at "Uncompressing Linux... done, booting the kernel."
Signed-off-by: NBen Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>

include/configs/da850evm.h

@@ -138,7 +138,7 @@
 /*
  * Linux Information
  */
-#define LINUX_BOOT_PARAM_ADDR	(CONFIG_SYS_MEMTEST_START + 0x100)
+#define LINUX_BOOT_PARAM_ADDR	(PHYS_SDRAM_1 + 0x100)
 #define CONFIG_CMDLINE_TAG
 #define CONFIG_SETUP_MEMORY_TAGS
 #define CONFIG_BOOTARGS		\