ARM: fix build warning in proc-v7-bugs.c

The kernel test robot discovered that building without
HARDEN_BRANCH_PREDICTOR issues a warning due to a missing
argument to pr_info().

Add the missing argument.

Reported-by: kernel test robot <[e-mail]>
Fixes: 9dd78194a372 ("ARM: report Spectre v2 status through sysfs")
Signed-off-by: Russell King (Oracle) <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/arm/mm/proc-v7-bugs.c

···
 #else
 static unsigned int spectre_v2_install_workaround(unsigned int method)
 {
-	pr_info("CPU%u: Spectre V2: workarounds disabled by configuration\n");
+	pr_info("CPU%u: Spectre V2: workarounds disabled by configuration\n",
+		smp_processor_id());
 
 	return SPECTRE_VULNERABLE;
 }