MIPS: OCTEON: cvmx-l2c: make cvmx_l2c_spinlock static

Make cvmx_l2c_spinlock static, it's not used outside the file.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21209/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@linux-mips.org

arch/mips/cavium-octeon/executive/cvmx-l2c.c

@@ -44,7 +44,7 @@
  * if multiple applications or operating systems are running, then it
  * is up to the user program to coordinate between them.
  */
-cvmx_spinlock_t cvmx_l2c_spinlock;
+static cvmx_spinlock_t cvmx_l2c_spinlock;
 
 int cvmx_l2c_get_core_way_partition(uint32_t core)
 {