efi/esrt: Clean up efi_esrt_init

Remove an unused variable in __init efi_esrt_init().
Simplify a logical constraint.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Link: https://lore.kernel.org/r/20200223204557.114634-1-xypron.glpk@gmx.de
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

drivers/firmware/efi/esrt.c

@@ -240,7 +240,6 @@ void __init efi_esrt_init(void)
 {
 	void *va;
 	struct efi_system_resource_table tmpesrt;
-	struct efi_system_resource_entry_v1 *v1_entries;
 	size_t size, max, entry_size, entries_size;
 	efi_memory_desc_t md;
 	int rc;
@@ -288,14 +287,13 @@ void __init efi_esrt_init(void)
 	memcpy(&tmpesrt, va, sizeof(tmpesrt));
 	early_memunmap(va, size);
 
-	if (tmpesrt.fw_resource_version == 1) {
-		entry_size = sizeof (*v1_entries);
-	} else {
+	if (tmpesrt.fw_resource_version != 1) {
 		pr_err("Unsupported ESRT version %lld.\n",
 		       tmpesrt.fw_resource_version);
 		return;
 	}
 
+	entry_size = sizeof(struct efi_system_resource_entry_v1);
 	if (tmpesrt.fw_resource_count > 0 && max - size < entry_size) {
 		pr_err("ESRT memory map entry can only hold the header. (max: %zu size: %zu)\n",
 		       max - size, entry_size);