staging: tidspbridge: MMU2 registers are limited to 32-bit data access

According to OMAP3 TRM access to MMU registers shall be strictly 32-bit
aligned.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Omar Ramirez Luna <omar.ramirez@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/tidspbridge/hw/hw_mmu.c

@@ -558,5 +558,5 @@ static hw_status mmu_set_ram_entry(const void __iomem *base_address,
 
 void hw_mmu_tlb_flush_all(const void __iomem *base)
 {
-	__raw_writeb(1, base + MMU_GFLUSH);
+	__raw_writel(1, base + MMU_GFLUSH);
 }