CONFIG_MACH_U300_BS365 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_U300_BS365.
Result is shown for kernelversion 6.2.5

S365/B365 Test Products

configname: CONFIG_MACH_U300_BS365

U300/U330/U335/U365 system type
└─>S365/B365 Test Products
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
Select this if you're developing on the
S365/B365 test products.