mm: drop leftover comment references to pxx_huge()

pxx_huge() has been removed in recent commit 9636f055 ("mm/treewide:
remove pXd_huge()"), however there are still three comments referencing
the API that got overlooked.  Remove them.

Link: https://lkml.kernel.org/r/20240527154855.528816-1-peterx@redhat.comSigned-off-by: Peter Xu <peterx@redhat.com>
Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Documentation/mm/arch_pgtable_helpers.rst

@@ -90,8 +90,6 @@ PMD Page Table Helpers
 +---------------------------+--------------------------------------------------+
 | pmd_leaf                  | Tests a leaf mapped PMD                          |
 +---------------------------+--------------------------------------------------+
-| pmd_huge                  | Tests a HugeTLB mapped PMD                       |
-+---------------------------+--------------------------------------------------+
 | pmd_trans_huge            | Tests a Transparent Huge Page (THP) at PMD       |
 +---------------------------+--------------------------------------------------+
 | pmd_present               | Tests whether pmd_page() points to valid memory  |
@@ -169,8 +167,6 @@ PUD Page Table Helpers
 +---------------------------+--------------------------------------------------+
 | pud_leaf                  | Tests a leaf mapped PUD                          |
 +---------------------------+--------------------------------------------------+
-| pud_huge                  | Tests a HugeTLB mapped PUD                       |
-+---------------------------+--------------------------------------------------+
 | pud_trans_huge            | Tests a Transparent Huge Page (THP) at PUD       |
 +---------------------------+--------------------------------------------------+
 | pud_present               | Tests a valid mapped PUD                         |

arch/x86/mm/pat/set_memory.c

@@ -1120,8 +1120,8 @@ __split_large_page(struct cpa_data *cpa, pte_t *kpte, unsigned long address,
 		lpinc = PMD_SIZE;
 		/*
 		 * Clear the PSE flags if the PRESENT flag is not set
-		 * otherwise pmd_present/pmd_huge will return true
-		 * even on a non present pmd.
+		 * otherwise pmd_present() will return true even on a non
+		 * present pmd.
 		 */
 		if (!(pgprot_val(ref_prot) & _PAGE_PRESENT))
 			pgprot_val(ref_prot) &= ~_PAGE_PSE;