x86: quark: Bypass TSC calibration

For some unknown reason, the TSC calibration via PIT does not work on
Quark. Enable bypassing TSC calibration and override TSC_FREQ_IN_MHZ
to 400 per Quark datasheet in the Kconfig.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/x86/cpu/quark/Kconfig

@@ -7,6 +7,7 @@
 config INTEL_QUARK
 	bool
 	select HAVE_RMU
+	select TSC_CALIBRATION_BYPASS
 
 if INTEL_QUARK
 
@@ -118,4 +119,8 @@ config SYS_CAR_SIZE
 	  Space in bytes in eSRAM used as Cache-As-ARM (CAR).
 	  Note this size must not exceed eSRAM's total size.
 
+config TSC_FREQ_IN_MHZ
+	int
+	default 400
+
 endif