Neopixelbus redo method definitions (#2616)

script/clang-tidy

@@ -32,6 +32,7 @@ def clang_options(idedata):
         '-D_PGMSPACE_H_',
         '-Dpgm_read_byte(s)=(*(const uint8_t *)(s))',
         '-Dpgm_read_byte_near(s)=(*(const uint8_t *)(s))',
+        '-Dpgm_read_word(s)=(*(const uint16_t *)(s))',
         '-Dpgm_read_dword(s)=(*(const uint32_t *)(s))',
         '-DPROGMEM=',
         '-DPGM_P=const char *',