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/xpedite550x/xpedite550x.c b/board/xes/xpedite550x/xpedite550x.c
index 2ad30a3..6f91c83 100644
--- a/board/xes/xpedite550x/xpedite550x.c
+++ b/board/xes/xpedite550x/xpedite550x.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);