board_r: Detect ifc-nor flash at run-time

CONFIG_MTD_NOR_FLASH flag needs to be enable for all
boot sources,as all flash drivers need to compile in
TFA Boot.Probe ifc nor flash only when there is nor
flash available on board.So needs to detect ifc-nor
flash at run-time for probing.

Signed-off-by: Pankit Garg <pankit.garg@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/common/board_r.c b/common/board_r.c
index 96034b8..b04e6ad 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -369,11 +369,19 @@
 }
 
 #if defined(CONFIG_MTD_NOR_FLASH)
+__weak int is_flash_available(void)
+{
+	return 1;
+}
+
 static int initr_flash(void)
 {
 	ulong flash_size = 0;
 	bd_t *bd = gd->bd;
 
+	if (!is_flash_available())
+		return 0;
+
 	puts("Flash: ");
 
 	if (board_flash_wp_on())