Fix some coding style errors in memblock.c

This patch removes the initialization of some static variables to 0 and
`false` in the memblock source file, according to the coding style
guidelines.

Signed-off-by: Claudio Migliorelli <claudio.migliorelli@mail.polimi.it>
Link: https://lore.kernel.org/r/87r0sa7mm8.fsf@mail.polimi.it
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>

Author: migliio

mm/memblock.c

@@ -156,10 +156,10 @@ static __refdata struct memblock_type *memblock_memory = &memblock.memory;
 	} while (0)
 
 static int memblock_debug __initdata_memblock;
-static bool system_has_some_mirror __initdata_memblock = false;
+static bool system_has_some_mirror __initdata_memblock;
 static int memblock_can_resize __initdata_memblock;
-static int memblock_memory_in_slab __initdata_memblock = 0;
-static int memblock_reserved_in_slab __initdata_memblock = 0;
+static int memblock_memory_in_slab __initdata_memblock;
+static int memblock_reserved_in_slab __initdata_memblock;
 
 static enum memblock_flags __init_memblock choose_memblock_flags(void)
 {