[coreboot] [PATCH] Hide CMOS_VSTART_ and CMOS_VLEN_ prefixes for read_option() use

[Patrick Georgi]

[let's try again]
Hi,

as a first step to the CMOS infrastructure project (as detailed in the
wiki), this patch changes read_option() by wrapping it in a macro,
simplifying its use from
read_option(CMOS_VSTART_foo, CMOS_VLEN_foo, somedefault)
to
read_option(foo, somedefault)

Signed-off-by: Patrick Georgi