Make timestamp collection conditional in hardwaremain.c

Otherwise it breaks 486 boards without RDTSC, ending with
exception 6.

It ends like this on bifferboard:

Jumping to image.
Unexpected Exception: 6 @ 10:001007e3 - Halting
Code: 0 eflags: 00000016
eax: 001001fe ebx: 00100118 ecx: 00000000 edx: 00108e00
edi: 0010aaf8 esi: 00000000 ebp: 00117ff4 esp: 00117fd8

Please keep in mind 486, dont use rdtsc/cpuid in generic code, or if you do make sure make it non-default option.

Change that broke it: http://review.coreboot.org/#/c/749/7/src/boot/hardwaremain.c

Change-Id: I974b25377c20a11430b35b24dcc275d8cbfd2b9a
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Reviewed-on: http://review.coreboot.org/925
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
1 file changed