of: fdt: Remove early_init_dt_reserve_memory_arch() override capability

Commit e7ae8d17 ("MIPS: replace add_memory_region with
memblock") removed the last architecture-specific override of
early_init_dt_reserve_memory_arch().
Convert the common implementation from a weak global function to a
static function.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/be0140a0183ecfd0a3afa4fe6d2d77ed418102f9.1628671897.git.geert+renesas@glider.beSigned-off-by: Rob Herring <robh@kernel.org>

drivers/of/fdt.c

@@ -475,6 +475,22 @@ 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,
+					phys_addr_t size, bool nomap)
+{
+	if (nomap) {
+		/*
+		 * If the memory is already reserved (by another region), we
+		 * should not allow it to be marked nomap.
+		 */
+		if (memblock_is_region_reserved(base, size))
+			return -EBUSY;
+
+		return memblock_mark_nomap(base, size);
+	}
+	return memblock_reserve(base, size);
+}
+
 /*
  * __reserved_mem_reserve_reg() - reserve all memory described in 'reg' property
  */
@@ -1147,22 +1163,6 @@ int __init __weak early_init_dt_mark_hotplug_memory_arch(u64 base, u64 size)
 	return memblock_mark_hotplug(base, size);
 }
 
-int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base,
-					phys_addr_t size, bool nomap)
-{
-	if (nomap) {
-		/*
-		 * If the memory is already reserved (by another region), we
-		 * should not allow it to be marked nomap.
-		 */
-		if (memblock_is_region_reserved(base, size))
-			return -EBUSY;
-
-		return memblock_mark_nomap(base, size);
-	}
-	return memblock_reserve(base, size);
-}
-
 static void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 {
 	void *ptr = memblock_alloc(size, align);

include/linux/of_fdt.h

@@ -68,8 +68,6 @@ extern void early_init_fdt_reserve_self(void);
 extern void __init early_init_dt_scan_chosen_arch(unsigned long node);
 extern void early_init_dt_add_memory_arch(u64 base, u64 size);
 extern int early_init_dt_mark_hotplug_memory_arch(u64 base, u64 size);
-extern int early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size,
-					     bool no_map);
 extern u64 dt_mem_next_cell(int s, const __be32 **cellp);
 
 /* Early flat tree scan hooks */