ALSA: pcm: fix blocking while loop in snd_pcm_update_hw_ptr0()

When period interrupts are disabled, while loop in snd_pcm_update_hw_ptr0()
results in the machine locking up if runtime->hw_ptr_buffer_jiffies is 0.

Validate runtime->hw_ptr_buffer_jiffies value before while loop to avoid
delta check.

CRs-Fixed: 1109229
Change-Id: Ib20b71c70aa4a8bee2837d1f3b5a91ad4ce083da
Signed-off-by: Preetam Singh Ranawat <apranawat@codeaurora.org>