mips: Remove CONFIG_VT82C686 from non-Fulong configs

Fix the regression introduced with commit
47934d0a [hw: move ISA bridges and
devices to hw/isa/, configure with default-configs/], by removing
CONFIG_VT82C686 from configurations that previously did not enable it.
That southbridge is only available on Fulong platforms (CONFIG_FULONG)
that are exclusively little-endian, 64-bit MIPS.  Previously vt82c686.o
was pulled explicitly with obj-$(CONFIG_FULONG).

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>

default-configs/mips-softmmu.mak

@@ -32,6 +32,5 @@ CONFIG_G364FB=y
 CONFIG_I8259=y
 CONFIG_JAZZ_LED=y
 CONFIG_MC146818RTC=y
-CONFIG_VT82C686=y
 CONFIG_ISA_TESTDEV=y
 CONFIG_EMPTY_SLOT=y

default-configs/mips64-softmmu.mak

@@ -32,6 +32,5 @@ CONFIG_G364FB=y
 CONFIG_I8259=y
 CONFIG_JAZZ_LED=y
 CONFIG_MC146818RTC=y
-CONFIG_VT82C686=y
 CONFIG_ISA_TESTDEV=y
 CONFIG_EMPTY_SLOT=y

default-configs/mipsel-softmmu.mak

@@ -32,6 +32,5 @@ CONFIG_G364FB=y
 CONFIG_I8259=y
 CONFIG_JAZZ_LED=y
 CONFIG_MC146818RTC=y
-CONFIG_VT82C686=y
 CONFIG_ISA_TESTDEV=y
 CONFIG_EMPTY_SLOT=y