usb: r8a66597: Fix initilization size of r8a66597 info structure

Initialization of r8a66597 info structure is not enough.
Because initilization was used size of pointer.
This fixes that use size of r8a6659 info structure.

Signed-off-by: Yasuhisa Umano <yasuhisa.umano.zc@renesas.com>

drivers/usb/host/r8a66597-hcd.c

@@ -807,7 +807,7 @@ int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
 
 	R8A66597_DPRINT("%s\n", __func__);
 
-	memset(r8a66597, 0, sizeof(r8a66597));
+	memset(r8a66597, 0, sizeof(*r8a66597));
 	r8a66597->reg = CONFIG_R8A66597_BASE_ADDR;
 
 	disable_controller(r8a66597);