Fixes:
solx_devfs.c:824:19: warning: comparison of integers of different signs: 'int' and 'pciaddr_t' (aka 'unsigned long') [-Wsign-compare]
    for (i = 0; i < size; i += PCITOOL_ACC_ATTR_SIZE(PCITOOL_ACC_ATTR_SIZE_1))
                ~ ^ ~~~~
solx_devfs.c:826:28: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
        cfg_prg.offset = offset + i;
                                ~ ^
solx_devfs.c:844:19: warning: implicit conversion changes signedness: 'int' to 'pciaddr_t' (aka 'unsigned long') [-Wsign-conversion]
    *bytes_read = i;
                ~ ^

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>