Kernel: Rename UHCIController::{spawn_port_proc => spawn_port_process}

There's no need to use this non-standard shorthand mnemonic.
(This commit also removes the unimplemented do_debug_transfer while
we're here.)

Kernel/Bus/USB/UHCI/UHCIController.cpp

@@ -76,7 +76,7 @@ ErrorOr<void> UHCIController::initialize()
     dmesgln("UHCI: I/O base {}", m_io_base);
     dmesgln("UHCI: Interrupt line: {}", interrupt_number());
 
-    spawn_port_proc();
+    spawn_port_process();
 
     TRY(reset());
     return start();
@@ -464,7 +464,7 @@ size_t UHCIController::poll_transfer_queue(QueueHead& transfer_queue)
     return transfer_size;
 }
 
-void UHCIController::spawn_port_proc()
+void UHCIController::spawn_port_process()
 {
     RefPtr<Thread> usb_hotplug_thread;
 

Kernel/Bus/USB/UHCI/UHCIController.h

@@ -42,9 +42,7 @@ public:
     virtual ErrorOr<void> reset() override;
     virtual ErrorOr<void> stop() override;
     virtual ErrorOr<void> start() override;
-    void spawn_port_proc();
-
-    void do_debug_transfer();
+    void spawn_port_process();
 
     virtual ErrorOr<size_t> submit_control_transfer(Transfer& transfer) override;