uart: fix missing inversion that will clear all other flags
uart: fix missing inversion that will clear all other flags

Signed-off-by: Jon Trulson <08664b19c2d4086eb239dd8ec32d593676a5b9e4@ics.com>
Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

arfoll/mraa,Hbrinj/mraa,Pillar1989/mraa,ProfFan/mraa,zBMNForks/mraa,neuroidss/mraa,Kiritoalex/mraa,Kiritoalex/mraa,zBMNForks/mraa,sergev/mraa,Pillar1989/mraa,ProfFan/mraa,yongli3/mraa,yongli3/mraa,alex1818/mraa,KurtE/mraa,mircea/mraa,sundw2014/mraa,noahchense/mraa,jontrulson/mraa,alext-mkrs/mraa,anonymouse64/mraa,w4ilun/mraa,sergev/mraa,arfoll/mraa,KurtE/mraa,damcclos/mraa,ncrastanaren/mraa,alex1818/mraa,neuberfran/mraa,andreivasiliu2211/mraa,petreeftime/mraa,alexandru-elisei/mraa,Propanu/mraa,yoyojacky/mraa,SyrianSpock/mraa,Propanu/mraa,stefan-andritoiu/mraa,nioinnovation/mraa,jontrulson/mraa,Meirtz/mraa,neuberfran/mraa,pctj101/mraa,w4ilun/mraa,noahchense/mraa,noahchense/mraa,whbruce/mraa,tripzero/mraa,alexandru-elisei/mraa,sergev/mraa,spitfire88/mraa,andreivasiliu2211/mraa,yoyojacky/mraa,malikabhi05/mraa,neuberfran/mraa,w4ilun/mraa,anonymouse64/mraa,malikabhi05/mraa,Kiritoalex/mraa,smileboywtu/mraa,g-vidal/mraa,neuroidss/mraa,stefan-andritoiu/mraa,petreeftime/mraa,alext-mkrs/mraa,allela-roy/mraa,arunlee77/mraa,intel-iot-devkit/mraa,STANAPO/mraa,yongli3/mraa,jontrulson/mraa,Jon-ICS/mraa,intel-iot-devkit/mraa,matt-auld/mraa,ncrastanaren/mraa,stefan-andritoiu/mraa,Propanu/mraa,Jon-ICS/mraa,Meirtz/mraa,stefan-andritoiu/mraa-gpio-chardev,intel-iot-devkit/mraa,petreeftime/mraa,sundw2014/mraa,alext-mkrs/mraa,yoyojacky/mraa,neuroidss/mraa,Propanu/mraa,matt-auld/mraa,ncrastanaren/mraa,andreivasiliu2211/mraa,whbruce/mraa,Meirtz/mraa,KurtE/mraa,smileboywtu/mraa,STANAPO/mraa,alex1818/mraa,malikabhi05/mraa,spitfire88/mraa,ProfFan/mraa,sundw2014/mraa,neuberfran/mraa,damcclos/mraa,SyrianSpock/mraa,mircea/mraa,spitfire88/mraa,arunlee77/mraa,noahchense/mraa,tripzero/mraa,zBMNForks/mraa,jontrulson/mraa,ncrastanaren/mraa,jontrulson/mraa,intel-iot-devkit/mraa,yongli3/mraa,intel-iot-devkit/mraa,tripzero/mraa,KurtE/mraa,alexandru-elisei/mraa,whbruce/mraa,Hbrinj/mraa,stefan-andritoiu/mraa-gpio-chardev,w4ilun/mraa,sundw2014/mraa,malikabhi05/mraa,matt-auld/mraa,g-vidal/mraa,g-vidal/mraa,mircea/mraa,sergev/mraa,SyrianSpock/mraa,Pillar1989/mraa,arunlee77/mraa,pctj101/mraa,Hbrinj/mraa,stefan-andritoiu/mraa,stefan-andritoiu/mraa-gpio-chardev,yongli3/mraa,stefan-andritoiu/mraa-gpio-chardev,alext-mkrs/mraa,Hbrinj/mraa,neuberfran/mraa,alexandru-elisei/mraa,alexandru-elisei/mraa,stefan-andritoiu/mraa,arfoll/mraa,damcclos/mraa,ncrastanaren/mraa,petreeftime/mraa,allela-roy/mraa,pctj101/mraa,Jon-ICS/mraa,Propanu/mraa,pctj101/mraa,stefan-andritoiu/mraa-gpio-chardev,sergev/mraa,andreivasiliu2211/mraa,arfoll/mraa,KurtE/mraa,g-vidal/mraa,smileboywtu/mraa,anonymouse64/mraa,arunlee77/mraa,pctj101/mraa,g-vidal/mraa,sundw2014/mraa,ProfFan/mraa,whbruce/mraa,alext-mkrs/mraa,allela-roy/mraa,STANAPO/mraa,spitfire88/mraa,noahchense/mraa,arfoll/mraa,nioinnovation/mraa,malikabhi05/mraa,nioinnovation/mraa