Problem:
While executing UDMA test cases for Block Copy / RX / TX High Capacity (HC) and Ultra High Capacity (UHC) channels,
the tests fail at Udma_chOpen() with UDMA_EALLOC because the resource manager (RM) does not expose HC channels.

Root Cause:

• CSL defines (cslr_dmss_defines.h) indicate hardware supports HC channels 
    (e.g. AM62Ax shows 6 RX HC channels).
• But board RM configuration (udma_rmcfg.c) marks HC resources as INVALID.
• During Udma_rmInitPrms_init(), rmInitPrms-> numRxHcCh  is set to 0.
• Hence Udma_rmAllocRxHcCh always return UDMA_DMA_CH_INVALID.
• Udma_chOpen() calls these allocation functions again internally and fails, even if manual allocation was attempted.

Impact:

• HC/UHC test cases cannot run on AM62Ax/AM62Dx/AM62x devices despite CSL showing support.
• No functional coverage can be achieved for HC/UHC resource allocation in udma_rm.c on these devices.

Files for reference:

• drivers/udma/v0/udma_rm.c (Udma_rmAllocRxHcCh, etc.)
• drivers/udma/v0/udma_ch.c (Udma_chOpen/Udma_chAllocResource)
• board RM config: udma_rmcfg.c (gUdmaRmDefBoardCfg_Bcdma, gUdmaRmDefBoardCfg_Udma)
• CSL: cslr_dmss_defines.h

TC : https://jira.itg.ti.com/browse/SITSW-8289