[ARM] Ensure deselected config variables are defined to 'n'

To keep the Config.in files relatively clean, we use the
following construct:

 if [ "$CONFIG_ARM" = "y" ]; then
    dep_tristate 'Foo' CONFIG_FOO $CONFIG_BAR
 fi

where CONFIG_BAR is some machine implementation or high-level
chip support configuration option.  If CONFIG_BAR is left
empty, then the tristate is offered to the user, which isn't
what we want.  Defining CONFIG_BAR to 'n' prevents the option
being offered.

This is a rule I generally try to implement within
arch/arm/config.in.

This cset makes CONFIG_SA1111 and CONFIG_ARM_THUMB behave that
way.

arch/arm/config.in

@@ -94,6 +94,8 @@ if [ "$CONFIG_ASSABET_NEPONSET" = "y" -o \
      "$CONFIG_SA1100_XP860" = "y" ]; then
    define_bool CONFIG_SA1111 y
    define_int CONFIG_FORCE_MAX_ZONEORDER 9
+else
+   define_bool CONFIG_SA1111 n
 fi
 
 comment 'Processor Type'
@@ -231,6 +233,8 @@ if [ "$CONFIG_CPU_ARM720T" = "y" -o "$CONFIG_CPU_ARM920T" = "y" -o \
      "$CONFIG_CPU_ARM922T" = "y" -o "$CONFIG_CPU_ARM926T" = "y" -o \
      "$CONFIG_CPU_ARM1020" = "y" -o "$CONFIG_CPU_XSCALE" = "y" ]; then
    dep_bool 'Support Thumb instructions (EXPERIMENTAL)' CONFIG_ARM_THUMB $CONFIG_EXPERIMENTAL
+else
+   define_bool CONFIG_ARM_THUMB n
 fi
 if [ "$CONFIG_CPU_ARM920T" = "y" -o "$CONFIG_CPU_ARM922T" = "y" -o \
      "$CONFIG_CPU_ARM926T" = "y" -o "$CONFIG_CPU_ARM1020" = "y" ]; then