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/xpedite537x/xpedite537x.c b/board/xes/xpedite537x/xpedite537x.c
index 89fa6c7..d074495 100644
--- a/board/xes/xpedite537x/xpedite537x.c
+++ b/board/xes/xpedite537x/xpedite537x.c
@@ -47,7 +47,7 @@
 	 */
 	flash_sel = !((pca953x_get_val(CONFIG_SYS_I2C_PCA953X_ADDR0) &
 			CONFIG_SYS_PCA953X_C0_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);