[MIPS] Do not allow oprofile to be enabled on SMTC.

Oprofile cannot work on SMTC due to the limited number of counters.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/oprofile/Kconfig

@@ -11,7 +11,7 @@ config PROFILING
 
 config OPROFILE
 	tristate "OProfile system profiling (EXPERIMENTAL)"
-	depends on PROFILING && EXPERIMENTAL
+	depends on PROFILING && !!MIPS_MT_SMTC && EXPERIMENTAL
 	help
 	  OProfile is a profiling system capable of profiling the
 	  whole system, include the kernel, kernel modules, libraries,