plat: imx8m: Implement IMX_SIP_BUILDINFO

The IMX_SIP_BUILDINFO call was implemented for imx8qm and imx8qx but
it's also applicable to imx8m.

This fixes U-Boot not printing commit hash on 8m with upstream TF-A.

Change-Id: Idcfd9729eaaccf329c24e241da325f1f6cd3c880
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
diff --git a/plat/imx/common/imx_sip_handler.c b/plat/imx/common/imx_sip_handler.c
index 4eabda7..89771cd 100644
--- a/plat/imx/common/imx_sip_handler.c
+++ b/plat/imx/common/imx_sip_handler.c
@@ -14,6 +14,8 @@
 #include <imx_sip_svc.h>
 #include <sci/sci.h>
 
+#if defined(PLAT_IMX8QM) || defined(PLAT_IMX8QX)
+
 #ifdef PLAT_IMX8QM
 const static int ap_cluster_index[PLATFORM_CLUSTER_COUNT] = {
 	SC_R_A53, SC_R_A72,
@@ -139,6 +141,8 @@
 	return sc_misc_set_temp(ipc_handle, x1, x2, x3, x4);
 }
 
+#endif /* defined(PLAT_IMX8QM) || defined(PLAT_IMX8QX) */
+
 static uint64_t imx_get_commit_hash(u_register_t x2,
 		    u_register_t x3,
 		    u_register_t x4)