build: Print the full TF-M version on boot

Unify the version extraction with documentation.

Print the boot TF-M version with tag and SHA, provieded by git describe
in a form: <TAG>+<SHA>

Signed-off-by: Anton Komlev <anton.komlev@arm.com>
Change-Id: I64b6202e231a98860973f7cb2ba8d5e3eeffb34f
diff --git a/secure_fw/spm/cmsis_psa/main.c b/secure_fw/spm/cmsis_psa/main.c
index 1777e44..4e886bb 100644
--- a/secure_fw/spm/cmsis_psa/main.c
+++ b/secure_fw/spm/cmsis_psa/main.c
@@ -133,7 +133,7 @@
     FIH_LABEL_CRITICAL_POINT();
 
     /* Print the TF-M version */
-    SPMLOG_INFMSG("\033[1;34mBooting TFM v"VERSION_FULLSTR"\033[0m\r\n");
+    SPMLOG_INFMSG("\033[1;34mBooting TF-M "VERSION_FULLSTR"\033[0m\r\n");
 
     /*
      * Prioritise secure exceptions to avoid NS being able to pre-empt