Fix mcu option

If the mcu temp sensor is not included in a build, it isn't showing up.
This is due to meson_options.txt having 2 different names for mcu;  mcu,
and mcu-temp.  The upstream recipe uses mcu to key, so lets just do
that.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ib84c96b97c534c81e9e4e83c838dffe4e26b6957
diff --git a/meson_options.txt b/meson_options.txt
index ba935d7..918d206 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -5,8 +5,7 @@
 option('hwmon-temp', type: 'feature', value: 'enabled', description: 'Enable HWMON temperature sensor.',)
 option('intrusion', type: 'feature', value: 'enabled', description: 'Enable intrusion sensor.',)
 option('ipmb', type: 'feature', value: 'enabled', description: 'Enable IPMB sensor.',)
-option('mcu', type: 'feature', value: 'enabled', description: 'Enable CPU sensor.',)
-option('mcu-temp', type: 'feature', value: 'enabled', description: 'Enable MCU sensor.',)
+option('mcu', type: 'feature', value: 'enabled', description: 'Enable MCU sensor.',)
 option('nvme', type: 'feature', value: 'disabled', description: 'Enable NVMe sensor.',)
 option('psu', type: 'feature', value: 'enabled', description: 'Enable PSU sensor.',)
 option('external', type: 'feature', value: 'enabled', description: 'Enable External sensor.',)