OMAP2xxx clock: fix broken cpu_mask code

Commit 8ad8ff6548 breaks the OMAP2xxx
cpu_mask code, which causes OMAP2xxx to panic on boot.  Fix by
removing the cpu_mask auto variable and by changing CK_242X
and CK_243X to use RATE_IN_242X/RATE_IN_243X.

Resolves

<1>Unable to handle kernel NULL pointer dereference at virtual address 0000000c
<1>pgd = c0004000
<1>[0000000c] *pgd=00000000
Internal error: Oops: 5 [#1]
Modules linked in:
CPU: 0    Not tainted  (2.6.29-omap1 #32)
PC is at omap2_clk_set_parent+0x104/0x120
LR is at omap2_clk_set_parent+0x28/0x120

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-omap2/clock24xx.c

@@ -60,8 +60,8 @@ struct omap_clk {
 		},			\
 	}
 
-#define CK_243X	(1 << 0)
-#define CK_242X	(1 << 1)
+#define CK_243X			RATE_IN_243X
+#define CK_242X			RATE_IN_242X
 
 static struct omap_clk omap24xx_clks[] = {
 	/* external root sources */
@@ -711,7 +711,7 @@ int __init omap2_clk_init(void)
 {
 	struct prcm_config *prcm;
 	struct omap_clk *c;
-	u32 clkrate, cpu_mask;
+	u32 clkrate;
 
 	if (cpu_is_omap242x())
 		cpu_mask = RATE_IN_242X;
@@ -728,12 +728,6 @@ int __init omap2_clk_init(void)
 	sys_ck.rate = omap2_sys_clk_recalc(&sys_ck);
 	propagate_rate(&sys_ck);
 
-	cpu_mask = 0;
-	if (cpu_is_omap2420())
-		cpu_mask |= CK_242X;
-	if (cpu_is_omap2430())
-		cpu_mask |= CK_243X;
-
 	for (c = omap24xx_clks; c < omap24xx_clks + ARRAY_SIZE(omap24xx_clks); c++)
 		if (c->cpu & cpu_mask) {
 			clkdev_add(&c->lk);