ARM: emif4: wait for CM_DLL_READYST to be set

The code intends for the CM_DLL_READYST to be set, but
actually polls till any bit is set since the logical
AND is used instead of the bitwise one is used. Fix it.

cc: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>

arch/arm/cpu/armv7/am33xx/emif4.c

@@ -115,7 +115,7 @@ void config_ddr(unsigned int pll, const struct ctrl_ioregs *ioregs,
 #endif
 #ifdef CONFIG_AM43XX
 	writel(readl(&cm_device->cm_dll_ctrl) & ~0x1, &cm_device->cm_dll_ctrl);
-	while ((readl(&cm_device->cm_dll_ctrl) && CM_DLL_READYST) == 0)
+	while ((readl(&cm_device->cm_dll_ctrl) & CM_DLL_READYST) == 0)
 		;
 	writel(0x80000000, &ddrctrl->ddrioctrl);