Adding -nodffe -nosdff to opt pass in case of qlf_k4n8 and qlf_k6n10 device, so as to avoid mapping to DFFE or SDFF
Adding -nodffe -nosdff to opt pass in case of qlf_k4n8 and qlf_k6n10 device, so as to avoid mapping to DFFE or SDFF

Signed-off-by: Lalit Narain Sharma <9c29c53297d5df8fd7b65c0b59d2e053721cab65@github.com>

SymbiFlow/yosys-f4pga-plugins,SymbiFlow/yosys-symbiflow-plugins,SymbiFlow/yosys-symbiflow-plugins,SymbiFlow/yosys-symbiflow-plugins,chipsalliance/yosys-f4pga-plugins,SymbiFlow/yosys-f4pga-plugins,SymbiFlow/yosys-f4pga-plugins,chipsalliance/yosys-f4pga-plugins