riscv: io.h: Add defines for reads/writes functions

Add defines for {read,write}s{b,w,l} functions to make asm-generic/io.h
aware of them.

Signed-off-by: Igor Prusov <ivprusov@salutedevices.com>

arch/riscv/include/asm/io.h

@@ -307,6 +307,14 @@ static inline void writesl(unsigned int *addr, const void *data, int longlen)
 		longlen--;
 	}
 }
+
+#define readsb readsb
+#define readsw readsw
+#define readsl readsl
+#define writesb writesb
+#define writesw writesw
+#define writesl writesl
+
 #endif
 
 #define outb_p(val, port)		outb((val), (port))