drivers: input: sbus: SBUS Channel data isn't parsed correctly.

[nikolaptr]

Describe the bug
Portion of SBUS Channel 4, 7, 12 and 15 data is discarded, resulting in invalid data for these channels.

To Reproduce
Dummy SBUS packet can be used to test parser

uint8_t dummy_packet[] = {0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00};

Each channel value is set to 2047, but parser returns invalid values for channels 4, 7, 12 and 15:

• CH4_Value = 1951
• CH7_Value = 2015
• CH12_Value = 1951
• CH15_Value = 2015

Rest of the channels are valid.

Expected behavior
All channel values should be equal to 2047

[nikolaptr]

It seems that when packet is processed in input_sbus_input_report_thread incoming data is stored in intermediate variable value until complete channel data is received. Issue is that value is uint16_t, resulting in discarded data in case more that 16 bit data needs to be stored at the same time.

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