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/board/xes/xpedite520x/xpedite520x.c b/board/xes/xpedite520x/xpedite520x.c
index dc5c965..c79171d 100644
--- a/board/xes/xpedite520x/xpedite520x.c
+++ b/board/xes/xpedite520x/xpedite520x.c
@@ -47,7 +47,7 @@
 	 */
 	flash_sel = !((pca953x_get_val(CONFIG_SYS_I2C_PCA953X_ADDR0) &
 			CONFIG_SYS_PCA953X_FLASH_PASS_CS));
-	printf("FLASH: Executed from FLASH%d\n", flash_sel ? 2 : 1);
+	printf("Flash: Executed from flash%d\n", flash_sel ? 2 : 1);
 
 	if (flash_sel) {
 		set_lbc_br(0, CONFIG_SYS_BR1_PRELIM);