cbmem_top_chipset: Change the return value to uintptr_t

Get rid of a lot of casts.

Change-Id: I93645ef5dd270905ce421e68e342aff4c331eae6
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69078
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>

src/mainboard/emulation/qemu-aarch64/cbmem.c

@@ -4,7 +4,7 @@
 #include <ramdetect.h>
 #include <symbols.h>
 
-void *cbmem_top_chipset(void)
+uintptr_t cbmem_top_chipset(void)
 {
-	return _dram + (probe_ramsize((uintptr_t)_dram, CONFIG_DRAM_SIZE_MB) * MiB);
+	return (uintptr_t)_dram + (probe_ramsize((uintptr_t)_dram, CONFIG_DRAM_SIZE_MB) * MiB);
 }

src/mainboard/emulation/qemu-armv7/cbmem.c

@@ -4,7 +4,7 @@
 #include <symbols.h>
 #include <ramdetect.h>
 
-void *cbmem_top_chipset(void)
+uintptr_t cbmem_top_chipset(void)
 {
-	return _dram + (probe_ramsize((uintptr_t)_dram, CONFIG_DRAM_SIZE_MB) * MiB);
+	return (uintptr_t)_dram + (probe_ramsize((uintptr_t)_dram, CONFIG_DRAM_SIZE_MB) * MiB);
 }

src/mainboard/emulation/qemu-i440fx/memmap.c

@@ -41,7 +41,7 @@ unsigned long qemu_get_memory_size(void)
 	return tomk;
 }
 
-void *cbmem_top_chipset(void)
+uintptr_t cbmem_top_chipset(void)
 {
 	uintptr_t top = 0;
 
@@ -56,7 +56,7 @@ void *cbmem_top_chipset(void)
 		smm_region(&top, &smm_size);
 	}
 
-	return (void *)top;
+	return top;
 }
 
 /* Nothing to do, MTRRs are no-op on QEMU. */

src/mainboard/emulation/qemu-power8/cbmem.c

@@ -2,10 +2,9 @@
 
 #include <cbmem.h>
 
-void *cbmem_top_chipset(void)
+uintptr_t cbmem_top_chipset(void)
 {
 	/* Top of cbmem is at lowest usable DRAM address below 4GiB. */
 	/* For now, last 1M of 4G */
-	void *ptr = (void *) ((1ULL << 32) - 1048576);
-	return ptr;
+	return (1ULL << 32) - 1048576;
 }

src/mainboard/emulation/qemu-power9/cbmem.c

@@ -3,7 +3,7 @@
 #include <cbmem.h>
 #include <ramdetect.h>
 
-void *cbmem_top_chipset(void)
+uintptr_t cbmem_top_chipset(void)
 {
-	return (void *)(probe_ramsize(0, CONFIG_DRAM_SIZE_MB) * MiB);
+	return probe_ramsize(0, CONFIG_DRAM_SIZE_MB) * MiB;
 }