drm: Reduce object size of DRM_ERROR and DRM_DEBUG uses

drm_printk is used for both DRM_ERROR and DRM_DEBUG with unnecessary
arguments that can be removed by creating separate functins.

Create specific functions for these calls to reduce x86/64 defconfig
size by ~20k.

Modify the existing macros to use the specific calls.

new:
$ size -t drivers/gpu/drm/built-in.a | tail -1
1876562	  44542	    995	1922099	 1d5433	(TOTALS)

old:
$ size -t drivers/gpu/drm/built-in.a | tail -1
1897565	  44542	    995	1943102	 1da63e	(TOTALS)

Miscellanea:

o intel_display requires a change to use the specific calls.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/016b5cb84cede20fd0f91ed6965421d99fd5f2ce.1520978414.git.joe@perches.com
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 250597e..da8e2d4 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11001,24 +11001,17 @@ intel_compare_link_m_n(const struct intel_link_m_n *m_n,
 static void __printf(3, 4)
 pipe_config_err(bool adjust, const char *name, const char *format, ...)
 {
-	char *level;
-	unsigned int category;
 	struct va_format vaf;
 	va_list args;
 
-	if (adjust) {
-		level = KERN_DEBUG;
-		category = DRM_UT_KMS;
-	} else {
-		level = KERN_ERR;
-		category = DRM_UT_NONE;
-	}
-
 	va_start(args, format);
 	vaf.fmt = format;
 	vaf.va = &args;
 
-	drm_printk(level, category, "mismatch in %s %pV", name, &vaf);
+	if (adjust)
+		drm_dbg(DRM_UT_KMS, "mismatch in %s %pV", name, &vaf);
+	else
+		drm_err("mismatch in %s %pV", name, &vaf);
 
 	va_end(args);
 }