nb/intel/gm45/gma: Fix debug note about missing panel data

Reformat the string, fix whitespace, add single-quote before
genitive `s`, and correct the GPU tool name `intel_reg`.

Change-Id: I277603063806927837867a454ae0875578228109
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75379
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
diff --git a/src/northbridge/intel/gm45/gma.c b/src/northbridge/intel/gm45/gma.c
index 0986ad5..c53e93c 100644
--- a/src/northbridge/intel/gm45/gma.c
+++ b/src/northbridge/intel/gm45/gma.c
@@ -115,12 +115,11 @@
 	}
 
 	if (i == blc_array_len)
-		printk(BIOS_NOTICE, "Your panels EDID `%s` wasn't found in the"
-		       "lookup table.\n You may have issues with your panels"
-		       "backlight.\n If you want to help improving coreboot"
-		       "please report: this EDID string\n and the result"
-		       "of `intel_read read BLC_PWM_CTL`"
-		       "(from intel-gpu-tools)\n while running vendor BIOS\n",
+		printk(BIOS_NOTICE, "Your panel's EDID `%s` wasn't found in the lookup table.\n"
+		       "You may have issues with your panel's backlight.\n"
+		       "If you want to help improving coreboot please report: this EDID string\n"
+		       "and the result of `intel_reg read BLC_PWM_CTL` (from intel-gpu-tools)\n"
+		       "while running vendor BIOS\n",
 		       edid_ascii_string);
 
 	return blc_pwm_freq;