Include <strings.h> for ffs(). ffs() is in <strings.h> although bsd compatible systems have it in <string.h> already. ffs() is used in omap1.c, omap2.c, omap_i2c.c, bt-sdp.c. These uses can be replaced with clz32() but ffs is more available. Problem was spotted by malc. Make host-utils.h formatting more consistent.
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