Fix -Wswitch warning (encountered on GCC - might also apply to CLang)

[CristiFati]

Including (recursively by other files (cudaOverlay.h)) imageFormat.inl, generates (annoying) compiler warnings:

.../jetson_utils/image/imageFormat.inl: In function 'const char* imageFormatToStr(imageFormat)':
.../jetson_utils/image/imageFormat.inl:33:8: warning: enumeration value 'IMAGE_COUNT' not handled in switch [-Wswitch]
   33 |  switch(format)
      |        ^
.../jetson_utils/image/imageFormat.inl: In function 'imageBaseType imageFormatBaseType(imageFormat)':
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_RGB8' not handled in switch [-Wswitch]
  142 |  switch(format)
      |        ^
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_RGBA8' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_BGR8' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_BGRA8' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_YUYV' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_YUY2' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_YVYU' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_UYVY' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_I420' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_YV12' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_NV12' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_BAYER_BGGR' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_BAYER_GBRG' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_BAYER_GRBG' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_BAYER_RGGB' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_GRAY8' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_COUNT' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl:142:8: warning: enumeration value 'IMAGE_UNKNOWN' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl: In function 'size_t imageFormatChannels(imageFormat)':
.../jetson_utils/image/imageFormat.inl:158:8: warning: enumeration value 'IMAGE_COUNT' not handled in switch [-Wswitch]
  158 |  switch(format)
      |        ^
.../jetson_utils/image/imageFormat.inl:158:8: warning: enumeration value 'IMAGE_UNKNOWN' not handled in switch [-Wswitch]
.../jetson_utils/image/imageFormat.inl: In function 'size_t imageFormatDepth(imageFormat)':
.../jetson_utils/image/imageFormat.inl:189:8: warning: enumeration value 'IMAGE_COUNT' not handled in switch [-Wswitch]
  189 |  switch(format)
      |        ^
.../jetson_utils/image/imageFormat.inl:189:8: warning: enumeration value 'IMAGE_UNKNOWN' not handled in switch [-Wswitch]

Fix (without affecting the behavior).

P.S.: Not a very big fan of the code style (all those TABs), but kept consistency.