Update docs (supported env vars).

hipamd/docs/markdown/hip_porting_guide.md

@@ -570,13 +570,10 @@ HIP_PRINT_ENV                  =  1 : Print HIP environment variables.
 HIP_LAUNCH_BLOCKING            =  0 : Make HIP APIs 'host-synchronous', so they block until any kernel launches or data copy commands complete. Alias: CUDA_LAUNCH_BLOCKING.
 HIP_DB                         =  0 : Print various debug info.  Bitmask, see hip_hcc.cpp for more information.
 HIP_TRACE_API                  =  0 : Trace each HIP API call.  Print function name and return code to stderr as program executes.
-HIP_STAGING_SIZE               = 64 : Size of each staging buffer (in KB)
-HIP_STAGING_BUFFERS            =  2 : Number of staging buffers to use in each direction. 0=use hsa_memory_copy.
-HIP_PININPLACE                 =  0 : For unpinned transfers, pin the memory in-place in chunks before doing the copy.  Under development.
-HIP_STREAM_SIGNALS             =  2 : Number of signals to allocate when new stream is created (signal pool will grow on demand)
+HIP_TRACE_API_COLOR            = green : Color to use for HIP_API.  None/Red/Green/Yellow/Blue/Magenta/Cyan/White
+HIP_ATP_MARKER                 =  0 : Add HIP function begin/end to ATP file generated with CodeXL
 HIP_VISIBLE_DEVICES            =  0 : Only devices whose index is present in the secquence are visible to HIP applications and they are enumerated in the order of secquence
-HIP_DISABLE_HW_KERNEL_DEP      =  1 : Disable HW dependencies before kernel commands  - instead wait for dependency on host. -1 means ignore these dependencies. (debug mode)
-HIP_DISABLE_HW_COPY_DEP        =  1 : Disable HW dependencies before copy commands  - instead wait for dependency on host. -1 means ifnore these dependencies (debug mode)
+HIP_NUM_KERNELS_INFLIGHT       = 128 : Number of kernels per stream
 
 ```