parisc: fix braino in commit adding __space_to_prot

Shouldn't commit without building before morning coffee...

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
diff --git a/arch/parisc/include/asm/mmu_context.h b/arch/parisc/include/asm/mmu_context.h
index 9302897..354b2ac 100644
--- a/arch/parisc/include/asm/mmu_context.h
+++ b/arch/parisc/include/asm/mmu_context.h
@@ -34,7 +34,7 @@
 	mm->context = 0;
 }
 
-static inline unsigned long __space_to_prot(mm_context_t ctx)
+static inline unsigned long __space_to_prot(mm_context_t context)
 {
 #if SPACEID_SHIFT == 0
 	return context << 1;