arm: tcc8k: Avoid reading clock register twice

There is no reason why in case of PLL2 the configuration register
should be read twice, while for PLL0/1 using the value previously read
is used. Do the same for PLL2.
Signed-off-by: Oskar Schirmer <oskar@linutronix.de>
Cc: bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/arm/mach-tcc8k/clock.c

@@ -199,7 +199,7 @@ static unsigned long get_rate_pll_div(int pll)
 		addr = CKC_BASE + CLKDIVC1_OFFS;
 		reg = __raw_readl(addr);
 		if (reg & CLKDIVC1_P2E)
-			div = __raw_readl(addr) & 0x3f;
+			div = reg & 0x3f;
 		break;
 	}
 	return get_rate_pll(pll) / (div + 1);