Braswell: Fix error in the warranty statement

Fix a cut and paste error in the warranty statement.

BRANCH=none
BUG=None
TEST=Build and run on cyan

Change-Id: If64b02f2c0fc2970932f23b99ad64beab5ab754e
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: http://review.coreboot.org/10835
Tested-by: build bot (Jenkins)
Reviewed-by: Jonathan A. Kollasch <jakllsch@kollasch.net>

src/soc/intel/braswell/include/soc/acpi.h

@@ -9,7 +9,7 @@
  * the Free Software Foundation; version 2 of the License.
  *
  * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied wacbmem_entryanty of
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *