Fix MISRA rule 8.4

Rule 8.4: A compatible declaration shall be visible when
an object or function with external linkage is defined

Fixed for:
	make DEBUG=1 PLAT=juno ARCH=aarch32 AARCH32_SP=sp_min RESET_TO_SP_MIN=1 JUNO_AARCH32_EL3_RUNTIME=1 bl32

Change-Id: I3ac25096b55774689112ae37bdf1222f9a9ecffb
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>

bl32/sp_min/sp_min_main.c

@@ -20,6 +20,7 @@
 #include <smccc_helpers.h>
 #include <stddef.h>
 #include <stdint.h>
+#include <std_svc.h>
 #include <string.h>
 #include <types.h>
 #include <utils.h>

plat/arm/css/drivers/scp/css_pm_scmi.c

@@ -298,7 +298,7 @@ void __dead2 css_scp_sys_reboot(void)
 	css_scp_system_off(SCMI_SYS_PWR_COLD_RESET);
 }
 
-scmi_channel_plat_info_t plat_css_scmi_plat_info = {
+static scmi_channel_plat_info_t plat_css_scmi_plat_info = {
 		.scmi_mbx_mem = CSS_SCMI_PAYLOAD_BASE,
 		.db_reg_addr = PLAT_CSS_MHU_BASE + CSS_SCMI_MHU_DB_REG_OFF,
 		.db_preserve_mask = 0xfffffffe,