Add functionality to identify the CPU vendor and features using the CPUID instruction.
The CPU vendor information is stored in the Processor Control Block (PRCB),
including the vendor name and a corresponding enumeration.
CPU features are also retrieved and stored in the PRCB.
Previously, the CPU vendor was not properly stored in the PRCB, caused by a missing type cast.
Using Rtl functions to copy the CPU vendor name to the PRCB.
Details:
- Introduced functions `ArpSetCpuVendor` and `ArpSetCpuFeatures` to set CPU vendor and features, respectively.
- Modified `ArpIdentifyProcessor` to call the new functions for vendor and features identification.
- Added `CPU_FEATURES` structure to `KPROCESSOR_CONTROL_BLOCK` structure to store CPU features.
Tests:
- Tested x86_64 on QEMU. Verified that the CPU vendor and features are correctly identified and stored in the PRCB.
