ASoC: rsnd: cleanup ppcheck warning for ssi.c

ASoC: rsnd: cleanup ppcheck warning for ssi.c

This patch cleanups below ppcheck warning.

sound/soc/sh/rcar/ssi.c:170:19: style: The scope of the variable 'mod' can be reduced. [variableScope]
 struct rsnd_mod *mod;
                  ^
sound/soc/sh/rcar/ssi.c:535:6: style: The scope of the variable 'i' can be reduced. [variableScope]
 int i;
     ^
sound/soc/sh/rcar/ssi.c:1212:19: style: The scope of the variable 'mod' can be reduced. [variableScope]
 struct rsnd_mod *mod;
                  ^
sound/soc/sh/rcar/ssi.c:328:16: portability: Shifting signed 32-bit value by 31 bits is implementation-defined behaviour [shiftTooManyBitsSigned]
 ssi->cr_clk = FORCE | rsnd_rdai_width_to_swl(rdai) |
               ^
sound/soc/sh/rcar/ssi.c:387:12: portability: Shifting signed 32-bit value by 31 bits is implementation-defined behaviour [shiftTooManyBitsSigned]
 cr_own |= FORCE | rsnd_rdai_width_to_swl(rdai);
           ^

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87k0qxro2j.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>