RISC-V: mm: Enable huge page support to kernel_page_present() function

Currently kernel_page_present() function doesn't support huge page
detection causes the function to mistakenly return false to the
hibernation core.

Add huge page detection to the function to solve the problem.

Signed-off-by: Sia Jee Heng <jeeheng.sia@starfivetech.com>
Reviewed-by: Ley Foon Tan <leyfoon.tan@starfivetech.com>
Reviewed-by: Mason Huo <mason.huo@starfivetech.com>

arch/riscv/mm/pageattr.c

@@ -221,14 +221,20 @@ bool kernel_page_present(struct page *page)
 	p4d = p4d_offset(pgd, addr);
 	if (!p4d_present(*p4d))
 		return false;
+	if (pgtable_l5_enabled && p4d_leaf(*pud))
+		return true;
 
 	pud = pud_offset(p4d, addr);
 	if (!pud_present(*pud))
 		return false;
+	if (pgtable_l4_enabled && pud_leaf(*pud))
+		return true;
 
 	pmd = pmd_offset(pud, addr);
 	if (!pmd_present(*pmd))
 		return false;
+	if (pmd_leaf(*pmd))
+		return true;
 
 	pte = pte_offset_kernel(pmd, addr);
 	return pte_present(*pte);