input: i8042 - Remove special Cayman handling

As of commit 37744fee ("sh: remove sh5 support"), support for
the SH5-based Cayman platform can no longer be selected.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rich Felker <dalias@libc.org>

drivers/input/serio/i8042-io.h

@@ -21,8 +21,6 @@
 #elif defined(__arm__)
 /* defined in include/asm-arm/arch-xxx/irqs.h */
 #include <asm/irq.h>
-#elif defined(CONFIG_SH_CAYMAN)
-#include <asm/irq.h>
 #elif defined(CONFIG_PPC)
 extern int of_i8042_kbd_irq;
 extern int of_i8042_aux_irq;