R0bur Might be that with 4.4-Kernel some pinctrls are initialised differently: Please try to replace GPIO_ACTIVE_HIGH to GPIO_ACTIVE_LOW for one or both leds (i.e: set 0x0 to 0x1)
Thank you for the recommendations!
I have solved the flashing blue led on RC-events trouble by removing "linux,default-trigger = "rc-feedback";" line from the red led section and putting "linux,default-trigger = "default-on";" line to the blue led section.
Next I try to play with GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW values:
"0x0" is most suitable case and red led works as expected. So my trouble is that the blue led doesn't switches its state.