[QEMU] Support -smp option up-to 255

This will detect CPUs up-to 255 and update MADT ProcessorLocalApic entries
with the detected CPU information.
- Set PcdCpuMaxLogicalProcessorNumber to 255 in QEMU BoardConfig.py

Test>
qemu-system-x86_64 -machine q35 -nographic -serial mon:stdio
                   -pflash Outputs/qemu/SlimBootloader.bin
                   -smp 8

Signed-off-by: Aiden Park <aiden.park@intel.com>

Platform/QemuBoardPkg/BoardConfig.py

@@ -48,6 +48,8 @@ class Board(BaseBoard):
 		self.ENABLE_GRUB_CONFIG       = 1
 		self.ENABLE_LINUX_PAYLOAD     = 1
 
+		self.CPU_MAX_LOGICAL_PROCESSOR_NUMBER = 255
+
 		# To enable source debug, set 1 to self.ENABLE_SOURCE_DEBUG
 		# self.ENABLE_SOURCE_DEBUG  = 1