ASoC: mchp-spdiftx: Fix clang -Wbitfield-constant-conversion

A recent change in clang strengthened its -Wbitfield-constant-conversion
to warn when 1 is assigned to a 1-bit signed integer bitfield, as it can
only be 0 or -1, not 1:

  sound/soc/atmel/mchp-spdiftx.c:505:20: error: implicit truncation from 'int' to bit-field changes value from 1 to -1 [-Werror,-Wbitfield-constant-conversion]
          dev->gclk_enabled = 1;
                            ^ ~
  1 error generated.

The actual value of the field is never checked, just that it is not
zero, so there is not a real bug here. However, it is simple enough to
silence the warning by making the bitfield unsigned, which matches the
mchp-spdifrx driver.

Fixes: 06ca24e ("ASoC: mchp-spdiftx: add driver for S/PDIF TX Controller")
Link: ClangBuiltLinux#1686
Link: llvm/llvm-project@82afc9b
Signed-off-by: Nathan Chancellor <[email protected]>
Reviewed-by: Nick Desaulniers <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: nathanchance

sound/soc/atmel/mchp-spdiftx.c

@@ -196,7 +196,7 @@ struct mchp_spdiftx_dev {
 	struct clk				*pclk;
 	struct clk				*gclk;
 	unsigned int				fmt;
-	int					gclk_enabled:1;
+	unsigned int				gclk_enabled:1;
 };
 
 static inline int mchp_spdiftx_is_running(struct mchp_spdiftx_dev *dev)