[roll third_party/pigweed] pw_spi: Remove deprecated constructor

Remove the deprecated LinuxInitiator constructor, which takes SPI bus
path. After this change, application code must open the bus and if
succeeds, inject the file descriptor into LinuxInitiator.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/126350

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: c7b11318ac76789..0e06d30fbd3e156
Roller-URL: https://ci.chromium.org/b/8792242169228567537
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6a52de70f9d6ea25475a1a0ef8fd0e6704e6ce8f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/126417
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index c7b1131..0e06d30 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c7b11318ac767898892dcca368cdcf447d639412
+Subproject commit 0e06d30fbd3e156015c9dc90cd47059ec61df410