mips: remove arch specific early_init_dt_alloc_memory_arch

Now that the DT core code handles bootmem arches, we can remove the MIPS
specific early_init_dt_alloc_memory_arch function.

Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Signed-off-by: NRob Herring <robh@kernel.org>

arch/mips/kernel/prom.c

@@ -44,11 +44,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 	return add_memory_region(base, size, BOOT_MEM_RAM);
 }
 
-void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
-{
-	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
-}
-
 int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
 					phys_addr_t size, bool nomap)
 {