drm/i915/csr: fix spelling mistake "firmare" -> "firmware"

Trivial fix to spelling mistake in DRM_INFO message
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20181107102211.19758-1-colin.king@canonical.com

drivers/gpu/drm/i915/intel_csr.c

@@ -499,7 +499,7 @@ void intel_csr_ucode_init(struct drm_i915_private *dev_priv)
 	if (i915_modparams.dmc_firmware_path) {
 		if (strlen(i915_modparams.dmc_firmware_path) == 0) {
 			csr->fw_path = NULL;
-			DRM_INFO("Disabling CSR firmare and runtime PM\n");
+			DRM_INFO("Disabling CSR firmware and runtime PM\n");
 			return;
 		}