meson: Fix psusensor

The psu sensor's process name was incorrectly set to psutempsensor and
is inconsistent with the service unit.
Fix this and use `psu` as the configure option instead of `psu-temp`,
because it is really psusensor including temperature/current/voltage/fan
sensors.

Tested: Verify the build binary is named as `psusensor`.

Signed-off-by: Lei YU <yulei.sh@bytedance.com>
Change-Id: Iee6bcdbb948a58dd10cfe26ab268944f1f9a14e6
diff --git a/meson_options.txt b/meson_options.txt
index 5fa3fd3..ba935d7 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -8,6 +8,6 @@
 option('mcu', type: 'feature', value: 'enabled', description: 'Enable CPU sensor.',)
 option('mcu-temp', type: 'feature', value: 'enabled', description: 'Enable MCU sensor.',)
 option('nvme', type: 'feature', value: 'disabled', description: 'Enable NVMe sensor.',)
-option('psu-temp', type: 'feature', value: 'enabled', description: 'Enable PSU sensor.',)
+option('psu', type: 'feature', value: 'enabled', description: 'Enable PSU sensor.',)
 option('external', type: 'feature', value: 'enabled', description: 'Enable External sensor.',)
 option('tests', type: 'feature', description: 'Build tests.',)