[U-Boot] fs/fat alignment

Note that checkpatch fails on this patch with the following warning, but I'm not sure how to resolve it.

Nothing else in the U-Boot code base seems to use __align() although it's defined in include/linux/compiler-gcc.h.

#46: FILE: fs/fat/fat.c:432: +__attribute__ ((__aligned__ (ARCH_DMA_MINALIGN)))

WARNING: __aligned(size) is preferred over __attribute__((aligned(size))) #46: FILE: fs/fat/fat.c:432: +__attribute__ ((__aligned__ (ARCH_DMA_MINALIGN)))

total: 0 errors, 2 warnings, 47 lines checked