meta-ampere: remove env call from service file

We are suppose to use direct executable calls in service files
rather than indirections through /bin/env (See Anti-patterns).

Tested:
- Check related services to work like before

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: Idb494ce781fa1bdcac176cd89612e6016e6e04d9
diff --git a/meta-ampere/meta-mitchell/recipes-ampere/host/ampere-sysfw-hang-handler/ampere-sysfw-hang-handler.service b/meta-ampere/meta-mitchell/recipes-ampere/host/ampere-sysfw-hang-handler/ampere-sysfw-hang-handler.service
index 5eeaf5c..7040b3e 100644
--- a/meta-ampere/meta-mitchell/recipes-ampere/host/ampere-sysfw-hang-handler/ampere-sysfw-hang-handler.service
+++ b/meta-ampere/meta-mitchell/recipes-ampere/host/ampere-sysfw-hang-handler/ampere-sysfw-hang-handler.service
@@ -6,7 +6,7 @@
 
 [Service]
 Type=simple
-ExecStart=/usr/bin/env ampere_sysfw_hang_handler.sh
+ExecStart=/usr/sbin/ampere_sysfw_hang_handler.sh
 SyslogIdentifier=ampere_sysfw_hang
 
 [Install]
diff --git a/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-mac-update/ampere_update_mac.service b/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-mac-update/ampere_update_mac.service
index f68f029..c816fac 100644
--- a/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-mac-update/ampere_update_mac.service
+++ b/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-mac-update/ampere_update_mac.service
@@ -6,7 +6,7 @@
 StartLimitBurst=5
 
 [Service]
-ExecStart=/usr/bin/env ampere_update_mac.sh eth0 14 80
+ExecStart=/usr/sbin/ampere_update_mac.sh eth0 14 80
 SyslogIdentifier=ampere_update_mac.sh
 RemainAfterExit=yes
 Restart=on-failure
diff --git a/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init/ampere-bmc-heartbeat.service b/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init/ampere-bmc-heartbeat.service
index 735d113..9a860f3 100644
--- a/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init/ampere-bmc-heartbeat.service
+++ b/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init/ampere-bmc-heartbeat.service
@@ -4,7 +4,7 @@
 [Service]
 Type=simple
 Restart=always
-ExecStart=/usr/bin/env ampere_bmc_heartbeat.sh
+ExecStart=/usr/sbin/ampere_bmc_heartbeat.sh
 SyslogIdentifier = "ampere-bmc-heartbeat"
 
 [Install]