meta-ampere: fix shellcheck issues

Fix all issues from the shellcheck checked on bash shells under
meta-ampere.

Tested: Verify the following features:
1. Power control (on,off, cycle, graceful shutdown, hard reset).
2. UART switching.
3. UEFI firmware update.

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: Idabf839b7521ecadb642230cc8bb3472c787002e
diff --git a/meta-ampere/meta-jade/recipes-phosphor/console/obmc-console/obmc-console-server-setup.sh b/meta-ampere/meta-jade/recipes-phosphor/console/obmc-console/obmc-console-server-setup.sh
index fe2d5ab..4e0a013 100644
--- a/meta-ampere/meta-jade/recipes-phosphor/console/obmc-console/obmc-console-server-setup.sh
+++ b/meta-ampere/meta-jade/recipes-phosphor/console/obmc-console/obmc-console-server-setup.sh
@@ -14,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -euo pipefail
-
 tty="$1"
 uart=0
 
@@ -39,4 +37,4 @@
 # this value should be set to 1
 /usr/sbin/ampere_uartmux_ctrl.sh ${uart} 2
 
-/usr/sbin/obmc-console-server --config /etc/obmc-console/server.${tty}.conf ${tty}
+/usr/sbin/obmc-console-server --config /etc/obmc-console/server."${tty}".conf "${tty}"