microcode: print date of microcode and unify output

Most subsystems print their name with a colon, and then the
message. Do the same thing for the microcode update code.

Also, each microcode update has a date header. Print the
date from that header to make it easier to determine whether
you're running the latest microcode.

Change-Id: Ic22947c4b9f0502d4091d975e1f1ab42f70aa1aa
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/929
Reviewed-by: Peter Stuge <peter@stuge.se>
Tested-by: build bot (Jenkins)
diff --git a/src/cpu/intel/microcode/microcode.c b/src/cpu/intel/microcode/microcode.c
index 91f7762..1511798 100644
--- a/src/cpu/intel/microcode/microcode.c
+++ b/src/cpu/intel/microcode/microcode.c
@@ -95,7 +95,7 @@
 	/* If this code is compiled with ROMCC we're probably in
 	 * the bootblock and don't have console output yet.
-	printk(BIOS_DEBUG, "microcode_info: sig=0x%08x pf=0x%08x rev=0x%08x\n",
+	printk(BIOS_DEBUG, "microcode: sig=0x%x pf=0x%x revision=0x%x\n",
 			sig, pf, rev);
@@ -111,8 +111,10 @@
 			new_rev = read_microcode_rev();
 #if !defined(__ROMCC__)
-			printk(BIOS_DEBUG, "microcode updated to revision: "
-				    "%08x from revision %08x\n", new_rev, rev);
+			printk(BIOS_DEBUG, "microcode: updated to revision "
+				    "0x%x date=%04x-%02x-%02x\n", new_rev,
+				    m->date & 0xffff, (m->date >> 16) & 0xff,
+				    (m->date >> 24) & 0xff);