arch/x86: Change smm_subregion() prototype

Do this to avoid some amount of explicit typecasting
that would be required otherwise.

Change-Id: I5bc2c3c1dd579f7c6c3d3354c0691e4ba3c778e1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34706
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/soc/amd/picasso/cpu.c

@@ -63,21 +63,21 @@ static int get_cpu_count(void)
 static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize,
 				size_t *smm_save_state_size)
 {
-	void *smm_base;
+	uintptr_t smm_base;
 	size_t smm_size;
-	void *handler_base;
+	uintptr_t handler_base;
 	size_t handler_size;
 
 	/* Initialize global tracking state. */
 	smm_region(&smm_base, &smm_size);
 	smm_subregion(SMM_SUBREGION_HANDLER, &handler_base, &handler_size);
 
-	relo_attrs.smbase = (uint32_t)smm_base;
+	relo_attrs.smbase = smm_base;
 	relo_attrs.tseg_base = relo_attrs.smbase;
 	relo_attrs.tseg_mask = ALIGN_DOWN(~(smm_size - 1), 128 * KiB);
 	relo_attrs.tseg_mask |= SMM_TSEG_WB;
 
-	*perm_smbase = (uintptr_t)handler_base;
+	*perm_smbase = handler_base;
 	*perm_smsize = handler_size;
 	*smm_save_state_size = sizeof(amd64_smm_state_save_area_t);
 }