book3s64/hash: Refactor hash__kernel_map_pages() function

This refactors hash__kernel_map_pages() function to call
hash_debug_pagealloc_map_pages(). This will come useful when we will add
kfence support.

No functionality changes in this patch.

Signed-off-by: Ritesh Harjani (IBM) <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://patch.msgid.link/0cb[e-mail]

arch/powerpc/mm/book3s64/hash_utils.c

···
 		linear_map_hash_slots[paddr >> PAGE_SHIFT] = slot | 0x80;
 }
 
-int hash__kernel_map_pages(struct page *page, int numpages, int enable)
+static int hash_debug_pagealloc_map_pages(struct page *page, int numpages,
+					  int enable)
 {
 	unsigned long flags, vaddr, lmi;
 	int i;
···
 	local_irq_restore(flags);
 	return 0;
 }
+
+int hash__kernel_map_pages(struct page *page, int numpages, int enable)
+{
+	return hash_debug_pagealloc_map_pages(page, numpages, enable);
+}
+
 #else /* CONFIG_DEBUG_PAGEALLOC */
 int hash__kernel_map_pages(struct page *page, int numpages,
 					 int enable)