type: Rename matrix_3x3_t to mat33_fp_t

Naming of many vector types and matrix types are not clear enough.
For example, we have:
  vector_3_t, which is a vector of three int.
  vec3_t, which is a vector of three float.
  size4_t, which is a vector of four size_t.
  mat33_t, which is a 3x3 matrix of float.
  matrix_3x3_t, which is a 3x3 matrix of fixed point.
Besides, we have types like int8_t, uint16_t types.

To clearly distinguished types, the CL propose to,

For vector types, naming should be `$type + 'v' + $num + '_t'`:
  vector_3_t becomes intv3_t
  vec3_t becomes floatv3_t
  vector 4 of uint16_t becomes uint16v4_t (which doesn't exist yet)

For matrix types, naming should be `mat$N$N_` + $type + '_t', where $N is the
matrix size:
  matrix_3x3_t becomes mat33_fp_t  # fp: fixed point
  mat33_t becomes mat33_float_t

TEST=make buildall -j
BUG=b:114662791

Change-Id: I51d88d44252184e4b7b3564236833b0b892edc39
Signed-off-by: Yilun Lin <yllin@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1215449
Commit-Ready: Yilun Lin <yllin@chromium.org>
Tested-by: Yilun Lin <yllin@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/board/rammus/board.c b/board/rammus/board.c
index 7bf268ec69..2b6c528b4a 100644
--- a/board/rammus/board.c
+++ b/board/rammus/board.c
@@ -563,13 +563,13 @@ static struct bmi160_drv_data_t g_bmi160_data;
 static struct accelgyro_saved_data_t g_bma255_data;
 
 /* Matrix to rotate accelrator into standard reference frame */
-const matrix_3x3_t base_standard_ref = {
+const mat33_fp_t base_standard_ref = {
 	{ FLOAT_TO_FP(-1), 0, 0 },
 	{ 0,  FLOAT_TO_FP(1), 0 },
 	{ 0, 0, FLOAT_TO_FP(-1) }
 };
 
-const matrix_3x3_t lid_standard_ref = {
+const mat33_fp_t lid_standard_ref = {
 	{ FLOAT_TO_FP(-1), 0, 0 },
 	{ 0,  FLOAT_TO_FP(1), 0 },
 	{ 0, 0, FLOAT_TO_FP(-1) }