ARM: rmobile: Replace CONFIG_RAVB with CONFIG_RENESAS_RAVB in boards

The configuration option name is the later, so replace usage of
CONFIG_RAVB in board files with CONFIG_RENESAS_RAVB , otherwise
the RAVB pinmux is not set and ethernet does not work.
Signed-off-by: NMarek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: NNobuhiro Iwamatsu <iwamatsu@nigauri.org>

board/renesas/salvator-x/salvator-x.c

@@ -116,7 +116,7 @@ int board_init(void)
 	/* USB1 pull-up */
 	setbits_le32(PFC_PUEN6, PUEN_USB1_OVC | PUEN_USB1_PWEN);
 
-#ifdef CONFIG_RAVB
+#ifdef CONFIG_RENESAS_RAVB
 	/* EtherAVB Enable */
 	/* GPSR2 */
 	gpio_request(GPIO_GFN_AVB_AVTP_CAPTURE_A, NULL);

board/renesas/ulcb/ulcb.c

@@ -105,7 +105,7 @@ int board_init(void)
 	/* USB1 pull-up */
 	setbits_le32(PFC_PUEN6, PUEN_USB1_OVC | PUEN_USB1_PWEN);
 
-#ifdef CONFIG_RAVB
+#ifdef CONFIG_RENESAS_RAVB
 	/* EtherAVB Enable */
 	/* GPSR2 */
 	gpio_request(GPIO_GFN_AVB_AVTP_CAPTURE_A, NULL);