Replace "FLASH" strings with "Flash" or "flash"

There's no compelling reason to have the output on bootup or the
"flinfo" command print "flash" in uppercase, so use the proper case
where appropriate.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/arch/microblaze/lib/board.c b/arch/microblaze/lib/board.c
index b06212e..c5f7ac4 100644
--- a/arch/microblaze/lib/board.c
+++ b/arch/microblaze/lib/board.c
@@ -127,7 +127,7 @@
 	printf ("\tU-Boot Start:0x%08x\n", CONFIG_SYS_TEXT_BASE);
 
 #if defined(CONFIG_CMD_FLASH)
-	puts ("FLASH: ");
+	puts ("Flash: ");
 	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 	if (0 < (flash_size = flash_init ())) {
 		bd->bi_flashsize = flash_size;