cpu: Quieten OS endian switch messages

Users see these when loading an OS from Petitboot:

 [  119.486794100,5] OPAL: Switch to big-endian OS
 [  120.022302604,5] OPAL: Switch to little-endian OS

Which is expected and doesn't provide any information the user can act
on. Switch them to PR_INFO so they still appear in the log, but not on
the serial console.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

core/cpu.c

@@ -1467,9 +1467,9 @@ static int64_t opal_reinit_cpus(uint64_t flags)
 	prlog(PR_DEBUG, "OPAL: CPU re-init with flags: 0x%llx\n", flags);
 
 	if (flags & OPAL_REINIT_CPUS_HILE_LE)
-		prlog(PR_NOTICE, "OPAL: Switch to little-endian OS\n");
+		prlog(PR_INFO, "OPAL: Switch to little-endian OS\n");
 	else if (flags & OPAL_REINIT_CPUS_HILE_BE)
-		prlog(PR_NOTICE, "OPAL: Switch to big-endian OS\n");
+		prlog(PR_INFO, "OPAL: Switch to big-endian OS\n");
 
  again:
 	lock(&reinit_lock);