Fix the function conflict in x86emu when DEBUG is on

The function parse_line() in common/main.c was exposed globally by commit
6636b62a6efc7f14e6e788788631ae7a7fca4537, Result in conflict with the same
name funciton in drivers/bios_emulator/x86emu/debug.c when define the DEBUG.
This patch fix this by renaming the function in the debug.c file.

Signed-off-by: Jason Jin <Jason.jin@freescale.com>

drivers/bios_emulator/x86emu/debug.c

@@ -50,7 +50,7 @@
 
 static void print_encoded_bytes(u16 s, u16 o);
 static void print_decoded_instruction(void);
-static int parse_line(char *s, int *ps, int *n);
+static int x86emu_parse_line(char *s, int *ps, int *n);
 
 /* should look something like debug's output. */
 void X86EMU_trace_regs(void)
@@ -257,7 +257,7 @@ void x86emu_single_step(void)
 	offset = M.x86.saved_ip;
 	while (!done) {
 		printk("-");
-		cmd = parse_line(s, ps, &ntok);
+		cmd = x86emu_parse_line(s, ps, &ntok);
 		switch (cmd) {
 		case 'u':
 			disassemble_forward(M.x86.saved_cs, (u16) offset, 10);
@@ -331,7 +331,7 @@ int X86EMU_trace_off(void)
 	return M.x86.debug &= ~(DEBUG_STEP_F | DEBUG_DECODE_F | DEBUG_TRACE_F);
 }
 
-static int parse_line(char *s, int *ps, int *n)
+static int x86emu_parse_line(char *s, int *ps, int *n)
 {
 	int cmd;