ARM: 9456/1: mm: fault: use string choices helper

We can use string choices helper, let's use it.
It makes one line code.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

Author: morimoto

arch/arm/mm/fault.c

@@ -135,8 +135,7 @@ static void die_kernel_fault(const char *msg, struct mm_struct *mm,
 	bust_spinlocks(1);
 	pr_alert("8<--- cut here ---\n");
 	pr_alert("Unable to handle kernel %s at virtual address %08lx when %s\n",
-		 msg, addr, fsr & FSR_LNX_PF ? "execute" :
-		 fsr & FSR_WRITE ? "write" : "read");
+		 msg, addr, fsr & FSR_LNX_PF ? "execute" : str_write_read(fsr & FSR_WRITE));
 
 	show_pte(KERN_ALERT, mm, addr);
 	die("Oops", regs, fsr);