of/fdt: Clean up early_init_dt_reserve_memory_arch()

As of commit 18250b43 ("of: fdt: Remove
early_init_dt_reserve_memory_arch() override capability") this is
no longer an arch hook, so rename it to remove the confusing _arch
suffix. Also remove some unnecessary indirection from all but one of
the callers by calling memblock_reserve() directly instead.
Signed-off-by: Peter Collingbourne <pcc@google.com>
Link: https://linux-review.googlesource.com/id/I3362bdd92ae6e47e8f5bac01aa228d32f9d01aadSigned-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220723015331.1607029-1-pcc@google.com

drivers/of/fdt.c

@@ -477,7 +477,7 @@ void *initial_boot_params __ro_after_init;
 
 static u32 of_fdt_crc32;
 
-static int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
+static int __init early_init_dt_reserve_memory(phys_addr_t base,
 					       phys_addr_t size, bool nomap)
 {
 	if (nomap) {
@@ -525,7 +525,7 @@ static int __init __reserved_mem_reserve_reg(unsigned long node,
 		size = dt_mem_next_cell(dt_root_size_cells, &prop);
 
 		if (size &&
-		    early_init_dt_reserve_memory_arch(base, size, nomap) == 0) {
+		    early_init_dt_reserve_memory(base, size, nomap) == 0) {
 			pr_debug("Reserved memory: reserved region for node '%s': base %pa, size %lu MiB\n",
 				uname, &base, (unsigned long)(size / SZ_1M));
 			if (!nomap)
@@ -644,7 +644,7 @@ void __init early_init_fdt_scan_reserved_mem(void)
 		fdt_get_mem_rsv(initial_boot_params, n, &base, &size);
 		if (!size)
 			break;
-		early_init_dt_reserve_memory_arch(base, size, false);
+		memblock_reserve(base, size);
 	}
 
 	fdt_scan_reserved_mem();
@@ -661,9 +661,8 @@ void __init early_init_fdt_reserve_self(void)
 		return;
 
 	/* Reserve the dtb region */
-	early_init_dt_reserve_memory_arch(__pa(initial_boot_params),
-					  fdt_totalsize(initial_boot_params),
-					  false);
+	memblock_reserve(__pa(initial_boot_params),
+			 fdt_totalsize(initial_boot_params));
 }
 
 /**