pxa2xx: remove useless checks

Remove checks which were made useless by r5849,
8da3ff1809.

This also avoids a warning with GCC flag -Wtype-limits.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

hw/pxa2xx.c

@@ -125,7 +125,7 @@ static void pxa2xx_pm_write(void *opaque, target_phys_addr_t addr,
         break;
 
     default:	/* Read-write registers */
-        if (addr >= PMCR && addr <= PCMD31 && !(addr & 3)) {
+        if (!(addr & 3)) {
             s->pm_regs[addr >> 2] = value;
             break;
         }