ARM: rmobile: alt: Fix I2C bus number

The I2C bus number to access the PMIC is I2C 7, fix this.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/board/renesas/alt/alt.c b/board/renesas/alt/alt.c
index 7b85000..0726776 100644
--- a/board/renesas/alt/alt.c
+++ b/board/renesas/alt/alt.c
@@ -107,7 +107,7 @@
 void reset_cpu(ulong addr)
 {
 	struct udevice *dev;
-	const u8 pmic_bus = 1;
+	const u8 pmic_bus = 7;
 	const u8 pmic_addr = 0x58;
 	u8 data;
 	int ret;