ARM: UniPhier: fix IECTRL set code for PH1-Pro4

For PH1-Pro4, the bit 6 of the IECTRL must be set.  It is the only
available bit in this register.  There is no effect of the write
access to the other bits.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

arch/arm/cpu/armv7/uniphier/ph1-pro4/sg_init.c

@@ -23,6 +23,6 @@ void sg_init(void)
 
 	/* Input ports must be enabled before deasserting reset of cores */
 	tmp = readl(SG_IECTRL);
-	tmp |= 0x1;
+	tmp |= 1 << 6;
 	writel(tmp, SG_IECTRL);
 }