fix(imx8mq): fix imx8mq build break due to hab

Add the HAB secure boot support for the i.MX8MQ to
fix the build break.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: I806de2dc42806e008355cc185065e774570362f0
diff --git a/plat/imx/common/include/imx_sip_svc.h b/plat/imx/common/include/imx_sip_svc.h
index 404a829..ecb43c3 100644
--- a/plat/imx/common/include/imx_sip_svc.h
+++ b/plat/imx/common/include/imx_sip_svc.h
@@ -72,6 +72,8 @@
 	SMC_RET1(handle, SMC_UNK);
 }
 #endif
+int imx_hab_handler(uint32_t smc_fid, u_register_t x1,
+	u_register_t x2, u_register_t x3, u_register_t x4);
 #endif
 #if defined(PLAT_imx8mm) || defined(PLAT_imx8mn) || defined(PLAT_imx8mp)
 int dram_dvfs_handler(uint32_t smc_fid, void *handle,