google/gale: Turn on monotonic timer support

Without monotonic timer support, timer related APIs like
timer_monotonic_get etc. are optimized out by the compiler. This
results in timed loops to become indefinite loops

	stopwatch_init_msecs_expire(...);
	do {
		something();
	} while (!stopwatch_expired(...));

In our specific case, loops sampling the recovery/wipeout button
in src/mainboard/google/gale/chromeos.c:get_switch_state() turned
into infinite loops and the boot didn't proceed.

BUG=chrome-os-partner:49249
TEST=Confirmed that the loop breaks per the specified timeout
using the minicom's console log time stamps
	[2016-04-11 12:34:37] recovery button pressed
	[2016-04-11 12:34:45] wipeout requested, checking recovery
	[2016-04-11 12:34:53] recovery requested
BRANCH=none

Change-Id: I7ed2616c50ebb28b43ad769d3105f7d4e31b1114
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: e00f888570b577849cb526220ffe6f22fe9d2ece
Original-Change-Id: Ic0b800558ebce482da6321c30dbf732080b82941
Original-Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/339873
Original-Commit-Ready: David Hendricks <dhendrix@chromium.org>
Original-Tested-by: Kan Yan <kyan@google.com>
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Original-Reviewed-by: Kan Yan <kyan@google.com>
Reviewed-on: https://review.coreboot.org/14673
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/qualcomm/ipq40xx/Kconfig

@@ -9,6 +9,7 @@ config SOC_QC_IPQ40XX
 	select HAVE_UART_SPECIAL
 	select SPI_ATOMIC_SEQUENCING
 	select GENERIC_GPIO_LIB
+	select HAVE_MONOTONIC_TIMER
 
 if SOC_QC_IPQ40XX