powerpc/pseries/lparcfg: drop error message from guest name lookup

It's not an error or exceptional situation when the hosting
environment does not expose a name for the LP/guest via RTAS or the
device tree. This happens with qemu when run without the '-name'
option. The message also lacks a newline. Remove it.
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Fixes: eddaa9a4 ("powerpc/pseries: read the lpar name from the firmware")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240524-lparcfg-updates-v2-1-62e2e9d28724@linux.ibm.com

arch/powerpc/platforms/pseries/lparcfg.c

@@ -371,8 +371,8 @@ static int read_dt_lpar_name(struct seq_file *m)
 
 static void read_lpar_name(struct seq_file *m)
 {
-	if (read_rtas_lpar_name(m) && read_dt_lpar_name(m))
-		pr_err_once("Error can't get the LPAR name");
+	if (read_rtas_lpar_name(m))
+		read_dt_lpar_name(m);
 }
 
 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))