Revert "sh: Ensure fixmap and store queue space can co-exist."

This reverts commit 20e7c297ef.
With store queues enabled the area above P4SEG has special properties
from the MMU's point of view, which was causing fixmap failure. We'll
have to do something else to satisfy the vmalloc range check.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/mm/fault.c

@@ -169,8 +169,8 @@ static noinline int vmalloc_fault(unsigned long address)
 	pmd_t *pmd_k;
 	pte_t *pte_k;
 
-	/* Make sure we are in vmalloc/module area: */
-	if (!is_vmalloc_addr((void *)address))
+	/* Make sure we are in vmalloc/module/P3 area: */
+	if (!(address >= P3SEG && address < P3_ADDR_MAX))
 		return -1;
 
 	/*