cmd: broadcom: add command for chimp handshake

Add command for chimp handshake.
Handshake is used to know chimp is loaded and booted successfully.

Signed-off-by: Bharat Kumar Reddy Gooty <bharat.gooty@broadcom.com>
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/broadcom/chimp.h b/include/broadcom/chimp.h
index 73bb1c2..738f73e 100644
--- a/include/broadcom/chimp.h
+++ b/include/broadcom/chimp.h
@@ -15,6 +15,12 @@
  */
 #define BCM_CHIMP_RUNNIG_GOOD	0x8000
 
+enum {
+	CHIMP_HANDSHAKE_SUCCESS = 0,
+	CHIMP_HANDSHAKE_WAIT_ERROR,
+	CHIMP_HANDSHAKE_WAIT_TIMEOUT,
+};
+
 /**
  * chimp_fastboot_optee() - api to load bnxt firmware
  *