arm: mach-k3: reserve space for page table entries

With the memory map configuration being done dynamically, reserve extra
space during U-Boot relocation to ensure we have enough for the fixups.

Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Anshul Dalal <anshuld@ti.com>

arch/arm/mach-k3/arm64/arm64-mmu.c

@@ -41,3 +41,8 @@ struct mm_region k3_mem_map[K3_MEM_MAP_LEN] = {
 };
 
 struct mm_region *mem_map = k3_mem_map;
+
+u64 get_page_table_size(void)
+{
+	return SZ_128K;
+}