Documentation: hwmon: coretemp: Update supported CPUs and TjMax values

Update the coretemp documentation to reflect current driver capabilities:

- Extend the supported CPU model list to include Atom processors from
  Bonnell through Jasper Lake, maintaining the original format with
  model numbers and adding X86_FEATURE_DTHERM as the actual detection
  mechanism. Added models: 0x37 (Bay Trail), 0x4a (Merrifield),
  0x4c (Cherry Trail), 0x5a (Moorefield), 0x5c (Apollo Lake),
  0x7a (Gemini Lake), 0x96 (Elkhart Lake), 0x9c (Jasper Lake)

- Update the description to note that per-package temperature sensing
  is available on Sandy Bridge and all newer processors

- Clarify that TjMax is read from MSR_IA32_TEMPERATURE_TARGET on modern
  CPUs (Nehalem and newer)

- Add TjMax values for newer Atom processor families to Appendix A:
  - 22nm Silvermont/Bay Trail: E38xx at 110C, Z37xx at 90C
  - 22nm Silvermont/Moorefield: Z35xx at 90C
  - 14nm Airmont/Cherry Trail: Z8xxx at 90C
  - 14nm Goldmont/Apollo Lake: 105C
  - 14nm Goldmont Plus/Gemini Lake: 105C
  - 10nm Tremont/Elkhart Lake: 105C
  - 10nm Tremont/Jasper Lake: 105C

TjMax values obtained from Intel ARK and official datasheets:
- E3845: https://www.intel.com/content/www/us/en/products/sku/78475/intel-atom-processor-e3845-2m-cache-1-91-ghz/specifications.html
- Z3600/Z3700: https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z36xxx-z37xxx-datasheet-vol-1.pdf

Signed-off-by: Laveesh Bansal <laveeshb@laveeshbansal.com>
Link: https://lore.kernel.org/r/20260106155426.547872-2-laveeshb@laveeshbansal.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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