intel/microcode.h: Fix typo in comment: micr*o*code

Introduced in commit »intel microcode: split up microcode loading
stages« (98ffb426) [1].

[1] http://review.coreboot.org/2778

Change-Id: I626508b10f3998b43aaabd49853090b36f5d3eb0
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/2992
Reviewed-by: Aaron Durbin <adurbin@google.com>
Tested-by: build bot (Jenkins)

src/include/cpu/intel/microcode.h

@@ -27,7 +27,7 @@ void intel_update_microcode_from_cbfs(void);
  * NULL if none found. */
 const void *intel_microcode_find(void);
 /* It is up to the caller to determine if parallel loading is possible as
- * well as ensuring the micrcode matches the family and revision (i.e. with
+ * well as ensuring the microcode matches the family and revision (i.e. with
  * intel_microcode_find()). */
 void intel_microcode_load_unlocked(const void *microcode_patch);
 #else