style(expect): normalize debugging messages

A minor style cleanup to the messages printed by the Expect scripts to
make them a bit more consistent and descriptive.

Signed-off-by: Chris Kay <chris.kay@arm.com>
Change-Id: Ibd8ccb4423bd5aaeffc99c2f3602123794dc6200
diff --git a/expect/spm-edk2-uart0.exp b/expect/spm-edk2-uart0.exp
index ce854df..843372e 100644
--- a/expect/spm-edk2-uart0.exp
+++ b/expect/spm-edk2-uart0.exp
@@ -16,13 +16,13 @@
 # EDK2 section
 expect {
 	"UEFI firmware" {
-		puts "<<EDK2 starting>>"
+		message "EDK2 starting"
 	}
 }
 
 expect {
 	"UEFI Interactive Shell" {
-		puts "<<EDK2 shell starting>>"
+		message "EDK2 shell starting"
 	}
 }
 
@@ -41,19 +41,19 @@
 expect {
 	"FS0:" {
 		send "UefiInfo.efi\r"
-		puts "<<Loading UEFI application>>"
+		message "Loading UEFI application"
 	}
 }
 
 expect {
 	-re "Loading driver at .* UefiInfo.efi" {
-		puts "<<UEFI application is being loaded>>"
+		message "UEFI application is being loaded"
 	}
 }
 
 expect {
 	"FS0:" {
-		puts "<<UEFI application loaded>>"
+		message "UEFI application loaded"
 	}
 }