xtensa: io: remove dummy relaxed accessor macros for reads

These are now defined by asm-generic/io.h, so we don't need the private
definitions anymore.

Cc: Chris Zankel <[e-mail]>
Acked-by: Max Filippov <[e-mail]>
Signed-off-by: Will Deacon <[e-mail]>

arch/xtensa/include/asm/io.h

···
 
 #endif /* CONFIG_MMU */
 
-/*
- * Generic I/O
- */
-#define readb_relaxed readb
-#define readw_relaxed readw
-#define readl_relaxed readl
-
 #endif	/* __KERNEL__ */
 
 #include <asm-generic/io.h>