lvm2: make it more explicit that readline support is disabled by default
lvm2: make it more explicit that readline support is disabled by default

Any PACKAGECONFIG default assigned with ??= is lost by subsequent
assignments with +=, therefore lvm2 is currently building with the
readline PACKAGECONFIG disabled. Make that explicitly clear in the
recipe. Also minor formatting updates, to align with style guide.

Signed-off-by: Andre McCurdy <8f09cea6116be1c651ee99f9f5914cb35309ce01@gmail.com>
Signed-off-by: Martin Jansa <516df3ff67e1fa5d153800b15fb204c0a1a389dc@gmail.com>

VCTLabs/meta-openembedded,fredcadete/meta-openembedded,amery/meta-openembedded,sigma-embedded/elito-org.openembedded.meta,amery/meta-openembedded,lgirdk/meta-openembedded,amery/meta-openembedded,moto-timo/meta-openembedded,sigma-embedded/elito-org.openembedded.meta,fredcadete/meta-openembedded,lgirdk/meta-openembedded,mrchapp/meta-openembedded,mrchapp/meta-openembedded,openembedded/meta-openembedded,schnitzeltony/meta-openembedded,schnitzeltony/meta-openembedded,openembedded/meta-openembedded,kraj/meta-openembedded,moto-timo/meta-openembedded,mrchapp/meta-openembedded,victronenergy/meta-openembedded,amery/meta-openembedded,schnitzeltony/meta-openembedded,rehsack/meta-openembedded,victronenergy/meta-openembedded,schnitzeltony/meta-openembedded,sigma-embedded/elito-org.openembedded.meta,fredcadete/meta-openembedded,rehsack/meta-openembedded,kraj/meta-openembedded,fredcadete/meta-openembedded,victronenergy/meta-openembedded,lgirdk/meta-openembedded,mrchapp/meta-openembedded,mrchapp/meta-openembedded,openembedded/meta-openembedded,rehsack/meta-openembedded,kraj/meta-openembedded,victronenergy/meta-openembedded,kraj/meta-openembedded,VCTLabs/meta-openembedded,VCTLabs/meta-openembedded,VCTLabs/meta-openembedded,kraj/meta-openembedded,openembedded/meta-openembedded,lgirdk/meta-openembedded,rehsack/meta-openembedded,kraj/meta-openembedded,moto-timo/meta-openembedded,amery/meta-openembedded,moto-timo/meta-openembedded,amery/meta-openembedded,victronenergy/meta-openembedded,mrchapp/meta-openembedded,schnitzeltony/meta-openembedded,amery/meta-openembedded,lgirdk/meta-openembedded,rehsack/meta-openembedded,VCTLabs/meta-openembedded,VCTLabs/meta-openembedded,openembedded/meta-openembedded,openembedded/meta-openembedded,fredcadete/meta-openembedded,fredcadete/meta-openembedded,victronenergy/meta-openembedded,fredcadete/meta-openembedded,openembedded/meta-openembedded,kraj/meta-openembedded,sigma-embedded/elito-org.openembedded.meta,sigma-embedded/elito-org.openembedded.meta,rehsack/meta-openembedded,sigma-embedded/elito-org.openembedded.meta,lgirdk/meta-openembedded,schnitzeltony/meta-openembedded,lgirdk/meta-openembedded,mrchapp/meta-openembedded,fredcadete/meta-openembedded,amery/meta-openembedded,sigma-embedded/elito-org.openembedded.meta,schnitzeltony/meta-openembedded,VCTLabs/meta-openembedded,rehsack/meta-openembedded,openembedded/meta-openembedded,VCTLabs/meta-openembedded,victronenergy/meta-openembedded,moto-timo/meta-openembedded