arm: omap5: make hw_init_data weak

this way we can let boards overwrite based
on what they need.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Reviewed-by: Tom Rini <trini@ti.com>

arch/arm/cpu/armv7/omap5/hw_data.c

@@ -593,7 +593,7 @@ const struct ctrl_ioregs ioregs_dra72x_es1 = {
 	.ctrl_ddr_ctrl_ext_0 = 0xA2000000,
 };
 
-void hw_data_init(void)
+void __weak hw_data_init(void)
 {
 	u32 omap_rev = omap_revision();