memblock tests: Fix testing with 32-bit physical addresses

Building memblock simulator on x86_64 with 32BIT_PHYS_ADDR_T=1
produces "cast to pointer from integer of different size" warnings.
Fix them by building the binary in 32-bit environment when using
32-bit physical addresses.

Signed-off-by: Karolina Drobnik <karolinadrobnik@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>

tools/testing/memblock/scripts/Makefile.include

@@ -11,7 +11,9 @@ ifeq ($(MOVABLE_NODE), 1)
 	CFLAGS += -D MOVABLE_NODE
 endif
 
-# Use 32 bit physical addresses
+# Use 32 bit physical addresses.
+# Remember to install 32-bit version of dependencies.
 ifeq ($(32BIT_PHYS_ADDR_T), 1)
-	CFLAGS += -U CONFIG_PHYS_ADDR_T_64BIT
+	CFLAGS += -m32 -U CONFIG_PHYS_ADDR_T_64BIT
+	LDFLAGS += -m32
 endif