soc/intel/apollolake: Fix parenthesis issues

Fix the following errors and warning detected by checkpatch.pl:

ERROR: space required before the open parenthesis '('
ERROR: space prohibited before that close parenthesis ')'
ERROR: return is not a function, parentheses are not required
WARNING: space prohibited between function name and open parenthesis '('

TEST=Build for reef

Change-Id: I31f854adf3269ba6f77c4044fb3748bb1957841c
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18725
Tested-by: build bot (Jenkins)
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/intel/apollolake/uart_early.c

@@ -65,7 +65,7 @@ void lpss_console_uart_init(void)
 
 uintptr_t uart_platform_base(int idx)
 {
-	return (CONFIG_CONSOLE_UART_BASE_ADDRESS);
+	return CONFIG_CONSOLE_UART_BASE_ADDRESS;
 }
 
 static const struct pad_config uart_gpios[] = {