Add support for 15H5EMS1.107 (Modern 15 H AI C1MG)

[Hogwarts-coder10]

Adds firmware string 15H5EMS1.107 to the CONF_G2_0 allowed firmware
list, alongside the existing 15H5EMS1.111 entry for the same model
(Modern 15 H AI C1MG).

Laptop: MSI Modern 15 H AI C1MG-045IN
CPU: Intel Core Ultra 7 155H
EC firmware: 15H5EMS1.107
BIOS: E15H5IMS.107

No register address changes — this is purely an allow-list addition,
since the EC layout is identical to the existing 15H5EMS1.111 entry.

Tested and confirmed working on this exact firmware:

• fw_version correctly reports 15H5EMS1.107
• cooler_boost: toggled on/off, fans audibly responded
• fan_mode: read/write confirmed via available_fan_modes
• charge_control_start_threshold / charge_control_end_threshold:
  full read/write/enforcement confirmed — set threshold to 0/85,
  battery charged past the previous 80% cap; reset to 70/80,
  charging stopped exactly at 80% as expected

[Hogwarts-coder10]

For reference, here's the dmesg output after loading the patched module:

msi_ec: loading out-of-tree module taints kernel.
msi_ec: module verification failed: signature and/or required key missing - tainting kernel
msi_ec: module_init
ACPI: battery: new hook: msi-ec

(The two taint warnings are expected for any out-of-tree/unsigned
module and aren't specific to this patch.)

fw_version readback after load:

$ cat /sys/devices/platform/msi-ec/fw_version
15H5EMS1.107

Confirms the driver correctly matches and reports the new firmware
string, and all G2_0 features (cooler_boost, fan_mode, charge_control thresholds) probed and functioned as described above.