sparc32: drop btfixup for check_pgt_cache

It is a noop for srmmu - so use a define as sparc64 does.
And drop all sparc callers - no need to confuse our-self
be calling a noop function.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/kernel/process_32.c

@@ -82,7 +82,6 @@ void cpu_idle(void)
 				cpu_relax();
 		}
 		schedule_preempt_disabled();
-		check_pgt_cache();
 	}
 }
 
@@ -105,7 +104,6 @@ void cpu_idle(void)
 				cpu_relax();
 		}
 		schedule_preempt_disabled();
-		check_pgt_cache();
 	}
 }