include: asm: types: add resource_size_t type

Added resource_size_t type in order to get rid of the following
compilation error whiel building dwc3 gadget.
include/linux/ioport.h:19:2: error: unknown type name ‘resource_size_t’

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>

arch/arm/include/asm/types.h

@@ -54,4 +54,5 @@ typedef unsigned long phys_size_t;
 
 #endif /* __KERNEL__ */
 
+typedef unsigned long resource_size_t;
 #endif