[ Upstream commit 1c1fb2653a0c2e3f310c07eacd8fc3a10e08c97a ]
jz4740_i2s_set_sysclk() does not check the return values of clk_get(),
while the file dereferences the pointers in clk_put().
Add the missed checks to fix it.
Fixes:
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| .. | ||
| Kconfig | ||
| Makefile | ||
| jz4740-i2s.c | ||
| jz4740-i2s.h | ||