powerpc: Remove remaining parts of oprofile

Commit 9850b6c ("arch: powerpc: Remove oprofile") removed
oprofile.

Remove all remaining parts of it.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/298432fe1a14c0a415760011d72c3f0999efd5e2.1657204631.git.christophe.leroy@csgroup.eu

arch/powerpc/include/asm/cputable.h

@@ -70,9 +70,6 @@ struct cpu_spec {
 	/* Used to restore cpu setup on secondary processors and at resume */
 	cpu_restore_t	cpu_restore;
 
-	/* Used by oprofile userspace to select the right counters */
-	char		*oprofile_cpu_type;
-
 	/* Name of processor class, for the ELF AT_PLATFORM entry */
 	char		*platform;